FORM 6-K

FORM 6-K

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Pursuant to Rule 13a - 16 or 15d - 16 of
The Securities and Exchange Act of 1934

For the Month of May, 2007

 

HANSON PLC


(Translation of registrant's name into English)


1 Grosvenor Place, London, SW1X 7JH, England


(Address of principal executive office)


[Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40F.]

Form 20-F X      Form 40-F

[Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.]

Yes         No X


NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART, IN, INTO OR
FROM ANY JURISDICTION WHERE TO DO THE SAME WOULD CONSTITUTE A VIOLATION OF THE
RELEVANT LAWS OF SUCH JURISDICTION

                                                                     15 May 2007

                            RECOMMENDED ACQUISITION
                                       of
                                   Hanson PLC
                                       by
   Lehigh UK Limited, a wholly-owned direct subsidiary of HeidelbergCement AG

Summary

. The boards of HeidelbergCement and Hanson are pleased to
announce their agreement on the terms of the recommended acquisition of the
entire issued and to be issued share capital of Hanson at a price of 1100 pence
in cash for each Hanson Share, valuing Hanson's fully diluted share capital at
approximately £8.0 billion.

. HeidelbergCement is one of the leading producers of
building materials worldwide, with its core products being cement, ready-mixed
concrete and concrete products, aggregates, building materials and related
activities. The HeidelbergCement Group employs around 46,000 people in more than
50 countries and generated revenues in excess of €9 billion in 2006.

North American operations have a leading role in the revenue of the
HeidelbergCement Group, with additional imports from other regions to meet
demand. HeidelbergCement has market leading positions in cement across Europe
and Central Asia. It is also active in building materials markets in India,
China, Indonesia and Africa.

. Hanson is one of the world's largest suppliers of heavy
building materials to the construction industry, with turnover in 2006 of £4.1
billion. Its products fall into two categories: "aggregates" (crushed rock, sand
and gravel, ready-mixed concrete, asphalt, and cement related products) and
"building products" (concrete pipes, pre-cast products, concrete pavers, blocks,
tiles and clay bricks). Hanson employs approximately 26,000 people, operating
primarily in North America, the UK and Australia with further operations in Asia
Pacific and Continental Europe.

. The combined group would be the second largest in its
industry, on a worldwide basis, by proforma market capitalisation.

. The combination of HeidelbergCement and Hanson is
strategically compelling, creating a strong, market leading, global building
materials group, benefiting from:

- leading worldwide positions in key product areas, including the largest
producer of aggregates, the second largest producer of ready-mixed concrete, and
the fourth largest producer of cement;

- combined proforma revenues of approximately €15 billion and over 70,000
employees;

- diversification across products and geographies;

- increased vertical integration in many markets around the world; and

- strong building products businesses, particularly in North America and the UK.

. The price of 1100 pence per Hanson Share represents:

- a premium of approximately 50 per cent. to the average closing
mid-market price of 734 pence per Hanson Share for the twelve months ended 2 May
2007, being the last business day prior to the announcement by HeidelbergCement
that it was reviewing its options with respect to its interest in Hanson,
including the possibility of seeking to acquire the Company;

- a premium of approximately 34 per cent. to the average closing
mid-market price of 820 pence per Hanson Share for the three months ended 2 May
2007; and

- a premium of approximately 29 per cent. to the closing mid-market price
of 852 pence per Hanson Share on 2 May 2007.

. The Loan Note Alternative will be made available to Hanson
Shareholders (other than Restricted Overseas Persons, US Holders, ADS Holders
and CDI Holders, who may not participate in the Loan Note Alternative).

. The Acquisition will be made by Lehigh, a wholly-owned
direct subsidiary of HeidelbergCement, and is proposed to be implemented by way
of a scheme of arrangement under section 425 of the Companies Act 1985.

. The Hanson Directors, who have been so advised by
Rothschild, consider the terms of the Acquisition to be fair and reasonable. In
providing its advice, Rothschild has taken into account the commercial
assessments of the Hanson Directors. Accordingly, the Hanson Directors intend
unanimously to recommend that Hanson Shareholders vote in favour of the Scheme
as they have undertaken to do in respect of their own beneficial holdings of
Hanson Shares, representing approximately 0.1 per cent. of the existing issued
share capital of Hanson.

Commenting on today's announcement, Dr. Bernd Scheifele, CEO of
HeidelbergCement, said:

"We are delighted that Hanson has agreed to recommend our proposed offer. It is
a defining moment for HeidelbergCement and its shareholders, and is consistent
with our focus on strategic expansion into complementary geographies, across
diversified products and customer markets.

HeidelbergCement and Hanson are a perfect fit for each other, sharing the same
enthusiasm for operational efficiency and focus on adding long-term value;
reflecting the exceptional dedication and capability of their respective
employees and management teams.

We believe that the combined business will be better able to respond to the
evolving needs of its customers in the competitive and rapidly consolidating
global building products industry.

We are also pleased to announce that we have asked Alan Murray, CEO of Hanson,
to join the top management of HeidelbergCement. His ongoing role is likely to
include responsibility for the US and Australian operations."

Mike Welton, Chairman of Hanson, said:

"The cash offer of 1100 pence per share is more than 12 times Hanson's EBITDA
for 2006 and represents very good value for Hanson Shareholders. Hanson and
HeidelbergCement are highly complementary businesses and together will become
one of the world's leading building materials suppliers. I believe the combined
group will provide excellent opportunities for many of Hanson's people around
the world."

Deutsche Bank is acting as financial adviser and broker to HeidelbergCement.

Hanson's financial adviser is Rothschild and its broker is Hoare Govett.

Deutsche Bank and Royal Bank of Scotland have arranged on a joint basis and have
fully underwritten the Facilities Agreement.

This summary should be read in conjunction with, and is subject to, the full
text of the following announcement and the Appendices.

Appendix I sets out certain further terms and conditions of the Scheme. Appendix
II sets out the bases and sources of certain of the information contained in
this announcement. Appendix III contains certain details relating to the
irrevocable undertakings given by the Hanson Directors. Appendix IV contains
details of the Loan Note Alternative and Appendix V contains the definitions of
certain terms used in this announcement.

Enquiries:

HeidelbergCement Tel: +49 (0) 62 214 810
Dr. Lorenz Naeger, Chief Financial Officer
Dr. Brigitte Fickel, Group Communication & Investor Relations

Deutsche Bank (financial adviser and broker to HeidelbergCement)

Anthony Parsons Tel: +44 (0) 20 7545 8000
James Arculus
Charles Wilkinson (Corporate Broking)
Dr. Berthold Fuerst Tel: +49 (0) 69 910 00
Dr. Alexander Mann

Finsbury (PR adviser to HeidelbergCement) Tel: +44 (0) 20 7251 3801
James Murgatroyd
Mike Smith
Andrew Mitchell

Hanson Tel: +44(0) 20 7245 1245
Charlotte Mulford, Media
Nick Swift, Investor Relations

Rothschild (financial adviser to Hanson) Tel: +44 (0) 20 7280 5000
John Deans
Richard Murley
Ed Welsh

Hoare Govett (corporate brokers to Hanson) Tel: +44 (0) 20 7678 8000
Paul Nicholls
Antonia Rowan

Financial Dynamics (PR adviser to Hanson) Tel: +44(0) 20 7831 3113
Andrew Lorenz
Jon Simmons



NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART, IN, INTO OR
FROM ANY JURISDICTION WHERE THE SAME WOULD CONSTITUTE A VIOLATION OF THE
RELEVANT LAWS OF SUCH JURISDICTION


                                                                     15 May 2007

                            RECOMMENDED ACQUISITION
                                       of
                                   Hanson PLC
                                       by
   Lehigh UK Limited, a wholly-owned direct subsidiary of HeidelbergCement AG

1       Introduction

On 3 May 2007, HeidelbergCement AG ("HeidelbergCement") announced that it was
reviewing its options with respect to its interest in Hanson PLC ("Hanson" or
the "Company"), including the possibility of seeking to acquire the Company.

The boards of HeidelbergCement and Hanson are now pleased to announce their
agreement on the terms of the recommended acquisition of the entire issued and
to be issued share capital of Hanson at a price of 1100 pence in cash for each
Hanson Share. The Acquisition will be made by Lehigh, a wholly-owned direct
subsidiary of HeidelbergCement. The Acquisition is proposed to be effected by
means of a scheme of arrangement under section 425 of the Companies Act.

HeidelbergCement is one of the leading producers of building materials
worldwide, with its core products being cement, ready-mixed concrete and
concrete products, aggregates, building materials and related activities. The
HeidelbergCement Group employs around 46,000 people in more than 50 countries
and generated revenues in excess of €9 billion in 2006.

North American operations have a leading role in the revenue of the
HeidelbergCement Group, with additional imports from other regions to meet
demand. HeidelbergCement has market leading positions in cement across Europe
and Central Asia. It is also active in building materials markets in India,
China, Indonesia and Africa.

2       The Acquisition

It is intended that the Acquisition will be implemented by way of a Court
sanctioned scheme of arrangement under section 425 of the Companies Act. Under
the terms of the Scheme, which will be subject to the further terms and
conditions set out below in Appendix I to this announcement and the full terms
and conditions to be set out in the Scheme Document, Hanson Shareholders holding
Hanson Shares at the Scheme Record Date will receive, subject to elections made
under the Loan Note Alternative:

                    For each Hanson Share 1100 pence in cash

This represents a price of 5500 pence in cash for each ADS and of 1100 pence in
cash for each CDI.

The terms of the Acquisition value the entire existing issued and to be issued
ordinary share capital of Hanson at approximately £8.0 billion and the Price
represents:

   .a premium of approximately 50 per cent. to the average closing mid-market
    price of 734 pence per Hanson Share for the twelve months ended 2 May 2007,
    being the last business day prior to the announcement by HeidelbergCement
    that it was reviewing its options with respect to its interest in Hanson,
    including the possibility of seeking to acquire the Company;


   .a premium of approximately 34 per cent. to the average closing mid-market
    price of 820 pence per Hanson Share for the three months ended 2 May 2007;
    and


   .a premium of approximately 29 per cent. to the closing mid-market price
    of 852 pence per Hanson Share on 2 May 2007.

If the Scheme becomes effective, subject to elections made under the Loan Note
Alternative, a payment of 1100 pence in cash per Hanson Share will be despatched
or, where appropriate, credited through CREST to Hanson Shareholders within 14
days of the Effective Date.

As it is anticipated that the Acquisition will complete in the third quarter of
2007, Hanson does not intend to pay an interim dividend.

3       Loan Note Alternative

As an alternative to some or all of the cash consideration which would otherwise
be receivable under the Scheme, shareholders will (other than Restricted
Overseas Persons, US Holders, ADS Holders and CDI Holders, who may not
participate in the Loan Note Alternative), subject to a minimum take up in
aggregate of £40 million, be able to elect to receive Loan Notes to be issued by
Lehigh on the following basis:

For every £1 of cash consideration £1 nominal value of Loan Notes

The Loan Notes will be guaranteed by HeidelbergCement. Further details of the
Loan Note Alternative are included in Appendix IV of this announcement and full
details will be included in the Scheme Document.

Under the Scheme, US Holders, ADS Holders, CDI Holders and Restricted Overseas
Persons will only be eligible to receive cash consideration, and will not be
eligible to elect to receive Loan Notes as consideration pursuant to the Loan
Note Alternative.

4       Background to and reasons for the Acquisition

A combination of HeidelbergCement and Hanson has clear strategic rationale, with
the potential for significant value creation. The industry globally has
continued to consolidate, with Cemex currently seeking to acquire Rinker.
HeidelbergCement intends to participate in this consolidation to maintain its
global position.

The combination of HeidelbergCement and Hanson is strategically compelling,
creating a strong, market leading, global building materials group, benefiting
from:

- leading worldwide positions in key product areas, including being the largest
producer of aggregates, the second largest producer of ready-mixed concrete, and
the fourth largest producer of cement;

- combined proforma revenues of approximately €15 billion and over 70,000
employees;

- diversification across products and geographies;

- increased vertical integration in many markets around the world; and

- strong building products businesses, particularly in North America and the UK.

HeidelbergCement believes the combination creates an opportunity to deliver
synergies through the combined group prior to any one-off expenses of
approximately 1.4 per cent. of the combined group's sales.(1)

5       Recommendation

The Hanson Directors, who have been so advised by Rothschild, consider the terms
of the Acquisition to be fair and reasonable. In providing its advice,
Rothschild has taken into account the commercial assessments of the Hanson
Directors. Accordingly, the Hanson Directors intend unanimously to recommend
that Hanson Shareholders vote in favour of the Scheme as they have undertaken to
do in respect of their own beneficial holdings of Hanson Shares, representing
approximately 0.1 per cent. of the existing issued share capital of Hanson.

6       HeidelbergCement's intentions regarding the business of Hanson

HeidelbergCement intends to continue to build upon the existing strengths of
Hanson's businesses and to develop Hanson's operations as part of the enlarged
group to ensure long-term, sustainable growth across the combined platform.

HeidelbergCement's management and board are committed to driving shareholder
value and will seek to enhance the performance of the business across all
product categories and geographies.

7       Management, employees and locations

HeidelbergCement attaches great importance to the skills and experience of the
existing management and employees of Hanson. HeidelbergCement expects that
Hanson employees and management will continue to play an important role in the
combined group, and will benefit fully from the opportunities afforded by the
enlarged organisation.

HeidelbergCement intends to offer Alan Murray, Chief Executive of Hanson, a
position on HeidelbergCement's management board. His ongoing role is likely to
include responsibility for the US and Australian operations.

HeidelbergCement has given assurances to the Hanson Board that the existing
employment rights, including pension rights of the employees of Hanson, will be
fully safeguarded upon completion of the Acquisition.

HeidelbergCement's plans do not involve any material change to the conditions of
employment of Hanson's employees, and any restructuring or disposals are
expected to be limited given the complementary nature of HeidelbergCement's and
Hanson's businesses. The HeidelbergCement board will review the combined group's
needs as regards corporate and operational headquarters, which may impact on the
present location of certain of HeidelbergCement's and Hanson's operations.
However, it is currently intended that the combined group will be headquartered
in Heidelberg, Germany.

8       Information on Hanson

Hanson is one of the world's largest suppliers of heavy building materials to
the construction industry, with turnover in 2006 of £4.1 billion. Its products
fall into two categories: "aggregates" (crushed rock, sand and gravel,
ready-mixed concrete, asphalt, and cement-related products) and "building
products" (concrete pipes, pre-cast products, concrete pavers, blocks, tiles and
clay bricks). Hanson employs approximately 26,000 people, operating primarily in
North America, the UK and Australia with further operations in Asia Pacific and
Continental Europe.

9       Information on HeidelbergCement

HeidelbergCement is one of the leading producers of building materials
worldwide, with its core products being cement, ready-mixed concrete and
concrete products, aggregates, building materials and related activities. The
HeidelbergCement Group employs around 46,000 people in more than 50 countries
and generated revenues in excess of €9 billion in 2006.

North American operations have a leading role in the revenue of the
HeidelbergCement Group, with additional imports from other regions to meet
demand. HeidelbergCement has market leading positions in cement across Europe
and Central Asia. It is also active in building materials markets in India,
China, Indonesia and Africa.

10      Information on Lehigh

Lehigh, a UK resident wholly-owned direct subsidiary of HeidelbergCement, is a
holding company within the HeidelbergCement Group but has no trading activities
other than in connection with the Proposals and the financing of the
Acquisition.

The current directors of Lehigh are Dr. Bernd Scheifele, Dr. Lorenz Naeger,
Mike Eberlin and Ian Flavell. Further information in relation to Lehigh will be
contained in the Scheme Document.

11      Hanson Share Schemes

Appropriate proposals will be made in due course to participants in the Hanson
Share Schemes.

12      Financing

To finance the consideration due under the Acquisition, HeidelbergCement Finance
B.V. and HeidelbergCement have entered into the Facilities Agreement which has
been arranged on a joint basis and fully underwritten by Deutsche Bank and Royal
Bank of Scotland. Up to £8.5 billion of the facilities made available under the
Facilities Agreement will be on-lent or otherwise provided to Lehigh by
HeidelbergCement Finance B.V. to satisfy the consideration payable to Hanson
Shareholders under the terms of the Scheme; the remainder of the facilities will
be used to fund payments under the Loan Note Alternative, to refinance certain
of HeidelbergCement's existing debts and major parts of the existing debt of the
Hanson Group, provide working capital for the enlarged HeidelbergCement Group
after completion of the Acquisition and pay certain fees and expenses associated
with the Acquisition. The facilities made available under the Facilities
Agreement will be partly refinanced through a combination of hybrid capital
issuance in an amount of up to €2 billion, the issue of bonds, and the
divestment of selected non-core activities. It is HeidelbergCement's intention
to maintain an investment grade rating for the enlarged group, and to support
its objective it intends, in addition to raising the funds required to finance
the Acquisition, to undertake a capital increase in an amount of approximately
€500 million.

Deutsche Bank has confirmed that it is satisfied that sufficient resources are
available to Lehigh to satisfy in full the cash consideration payable to Hanson
Shareholders under the terms of the Scheme. Further information on the financing
of the Proposals will be set out in the Scheme Document.

Under the Facilities Agreement, HeidelbergCement has agreed, amongst other
things (and will procure compliance from Lehigh), that save as may be required
by the Panel or the Court it will not waive, amend, withdraw or agree not to
enforce any term or condition of the Proposals (in each case in a manner that
could reasonably be expected to be material or prejudicial to the lenders under
the Facilities Agreement) without the prior consent of Royal Bank of Scotland
(as agent) acting on behalf of the Majority Lenders (as defined in the
Facilities Agreement).

13       Irrevocable undertakings

Lehigh has received irrevocable undertakings to vote in favour of the Proposals
and the resolutions at the Court Meeting and EGM from the Hanson Directors in
respect of 700,926 Hanson Shares, representing approximately 0.1 per cent. of
the existing issued ordinary share capital of Hanson. These undertakings are in
respect of both their entire beneficial holdings of Hanson Shares and any other
Hanson Shares in which they are interested (such as those held by members of
their family). These undertakings will cease to have any effect if the Scheme is
withdrawn or otherwise lapses. Appendix III contains further details relating to
these undertakings.

14      Structure of the Acquisition, delisting and re-registration

It is intended that the Acquisition will be effected by means of a Court
sanctioned scheme of arrangement between Hanson and Hanson Shareholders under
section 425 of the Companies Act. The procedure will involve an application by
Hanson to the Court to sanction the Scheme and confirm the cancellation of all
Cancellation Shares.

Hanson Shareholders will be able to elect to receive either cash consideration
or (unless they are a US Holder, ADS Holder, CDI Holder or a Restricted Overseas
Person) Loan Notes as described in paragraph 3 of this announcement. The
implementation of the Scheme will be subject to the further terms and conditions
set out in Appendix I and the full terms and conditions which will be set out in
the Scheme Document and will only become effective if, among other things, the
following events occur:

. a resolution to approve the Scheme is passed by a majority
in number of the Scheme Shareholders present and voting (and entitled to vote),
either in person or by proxy at the Court Meeting, representing not less than
three-quarters in value of the Scheme Shares held by such Scheme Shareholders;

. the special resolution to implement the Scheme and to
amend the Hanson Articles is passed at the Extraordinary General Meeting; and

. the Scheme is sanctioned (with or without modification),
and the associated Reduction of Capital is confirmed, by the Court and the
Scheme becomes effective by registration of the Court Orders with the Registrar
of Companies and the issue by the Registrar of Companies of a certificate under
section 138 of the Companies Act in relation to the Reduction of Capital
associated with the Scheme.

The purpose of the Scheme is to provide for Lehigh to become the owner of the
whole of the issued and to be issued ordinary share capital of Hanson not
already held by members of the HeidelbergCement Group. This is expected to be
achieved by:

. the cancellation of the Cancellation Shares (including
those represented by ADSs and CDIs) held by Scheme Shareholders and the
application of the reserve arising from such cancellation in paying up in full a
number of new Hanson Shares (which is equal to the number of Cancellation Shares
cancelled) and issuing them to Lehigh; and

. immediately after the cancellation of the Cancellation
Shares and the issue of new Hanson Shares to Lehigh, the transfer by Hanson
Shareholders to Lehigh of the Loan Note Elected Shares in accordance with the
Scheme in consideration for which relevant Scheme Shareholders will be issued
Loan Notes, on the basis set out in paragraph 3 of this announcement, instead of
the cash consideration which they would otherwise have been entitled to receive.

If the Scheme has not become effective by 31 December 2007, or such later date
as Lehigh and Hanson may agree (with, where applicable, the consent of the
Panel) and the Court may allow, it will lapse.

Upon the Scheme becoming effective, it will be binding on all Hanson
Shareholders, irrespective, in the case of Hanson Shareholders, of whether or
not they attended or voted at the Court Meeting or the EGM (and if they attended
and voted, whether or not they voted in favour), with cash consideration (in
respect of the Cancellation Shares) and Loan Notes (in respect of the Loan Note
Elected Shares) being despatched by Lehigh to Hanson Shareholders no later than
14 days after the Effective Date.

Hanson intends to make applications to the UK Listing Authority for the listing
of Hanson Shares to be cancelled and to cease to be admitted to trading on the
London Stock Exchange's market for listed securities, with effect as of or
shortly following the Effective Date.

Hanson also intends to make application to the New York Stock Exchange to delist
the ADSs from the New York Stock Exchange as of or shortly following the
Effective Date.

Similarly, Hanson has agreed to make applications to ASX for the termination of
the quotation of the CDIs and to remove Hanson from the official list of ASX.

The Scheme will contain a provision for Hanson to consent, on behalf of all
persons concerned, to any modification of or addition to the Scheme or to any
condition that the Court may approve or impose. Hanson has been advised that it
is unlikely that the Court would impose any condition to the Scheme that might
be material to the interests of Hanson Shareholders unless Hanson Shareholders
were informed in advance.

Lehigh reserves the right to elect to implement the acquisition of the Hanson
Shares by way of a takeover offer. In such event, the Offer will be implemented
on the same terms (subject to appropriate amendments), so far as applicable, as
those which would apply to the Scheme except that the Offer may exclude Hanson
Shareholders resident in certain overseas jurisdictions.

Further details of the Scheme, including an indicative timetable for its
implementation, will be contained in the Scheme Document, together with details
on how Hanson Shareholders, ADS Holders and CDI Holders may participate in the
Proposals.

15      Implementation Agreement

HeidelbergCement, Lehigh and Hanson have entered into an Implementation
Agreement which contains certain assurances in relation to the implementation of
the Scheme and related matters. Further information regarding this
Implementation Agreement will be set out in the Scheme Document. In particular,
the Implementation Agreement contains the principal provisions set out below.

Undertakings to implement the Scheme

Hanson has undertaken to HeidelbergCement and Lehigh to take certain steps to
implement the Scheme, including the despatch of the Scheme Document, convening
the Court Meeting and the EGM, and taking steps to seek the Court Orders at the
Court hearings to make the Scheme effective.

Inducement Fee

As a pre-condition to Lehigh agreeing to announce the Acquisition, Hanson has
agreed in the Implementation Agreement to pay the Inducement Fee to Lehigh if,
(a) an Alternative Proposal is announced (for the purposes of Rule 2.5 of the
Code or equivalent) and (b) following such announcement, the Scheme is not
proposed or made or it lapses or is withdrawn; and (c) such Alternative Proposal
becomes wholly unconditional.

Non-solicitation arrangements

Hanson has undertaken not to:

(a) solicit or otherwise seek to initiate any Competing Proposal;

(b) enter into or continue any discussions, negotiations, communication or
correspondence relating to or which may be expected to lead to any Competing
Proposal; or

(c) release any third party from any confidentiality or standstill agreement, or
amend any such agreement, entered into in connection with any Competing
Proposal,

save by virtue of it complying with the rules of the Code or, in the case of (b)
and (c) above, to the extent that to fail to do so would not be in the best
interests of Hanson Shareholders or would otherwise be in breach of the
fiduciary duties of the Hanson Directors.

Hanson has undertaken to inform Lehigh as soon as reasonably practicable of the
making of any Competing Proposal, or any request for information pursuant to
Rule 20.2 of the Code.

Termination

The Implementation Agreement may be terminated in the following circumstances:

(a) by agreement in writing between Lehigh and Hanson at any time;

(b) by Lehigh in the event of failure of any of the Conditions (subject to
the Panel permitting such Condition to be invoked); or

(c) if the Scheme is not approved by the requisite majority of Hanson
Shareholders at the Court Meeting of Hanson Shareholders or the EGM Resolution
is not passed by the requisite majority at the Hanson EGM.

16      Disclosure of interests in Hanson

Except as disclosed below, as at the close of business on 11 May 2007, the
latest practicable business day prior to the date of this announcement, neither
Lehigh nor any of the directors of Lehigh, nor, so far as Lehigh is aware, any
person acting in concert with Lehigh (i) has any interest in or right to
subscribe for relevant Hanson securities, nor (ii) has any short positions in
respect of relevant Hanson securities (whether conditional or absolute and
whether in the money or otherwise), including any short position under a
derivative, any agreement to sell or any delivery obligation or right to require
another person to take delivery, nor (iii) has borrowed or lent any relevant
Hanson securities (save for any borrowed shares which have been on-lent or
sold):

The interests of HeidelbergCement consist of, as at 11 May 2007, a long position
of 21,056,885 Hanson Shares.

The interests of Deutsche Bank and its affiliates consist of, as at 11 May 2007,
a long position of 66,767 Hanson Shares and a short position of 11,994 Hanson
ADSs.

In the interest of secrecy prior to this announcement, HeidelbergCement has not
made any such enquiries in respect of certain parties who may be deemed by the
Panel to be acting in concert with them for the purposes of the Proposals.
Enquiries of such parties will be made as soon as practicable following the date
of this announcement and any material disclosure in respect of such parties will
be included in the Scheme Document.

17      Overseas shareholders

The availability of the Proposals to Hanson Shareholders who are not resident in
the United Kingdom may be affected by the laws of their relevant jurisdiction.
Such persons should inform themselves of, and observe, any applicable legal or
regulatory requirements of their jurisdiction. If you remain in any doubt, you
should consult an appropriate independent professional adviser in the relevant
jurisdiction without delay.

The Loan Note Alternative will not be available to US Holders, ADS Holders, CDI
Holders or Restricted Overseas Persons and consequently such persons will not be
eligible to receive Loan Notes.

Under the terms of the Proposals, Lehigh has reserved the right to make a
takeover offer for Hanson as an alternative to a Scheme. If Lehigh exercises its
right to implement the Acquisition by means of the Offer, the Offer will be made
in compliance with applicable laws and regulations.

18      General

The Scheme will be made on the terms and subject to the Scheme Conditions set
out herein and in Appendix I, and to be set out in the Scheme Document. The
Scheme Document will be posted to Hanson Shareholders, ADS Holders and CDI
Holders and made available, for information only, to participants in the Hanson
Share Schemes, as soon as practicable.

The Scheme will be governed by English law. The Scheme will be subject to the
applicable requirements of the Takeover Code, the Takeover Panel, the London
Stock Exchange and the UK Listing Authority.

Neither HeidelbergCement nor Lehigh nor, so far as HeidelbergCement and Lehigh
are aware, any person acting in concert with HeidelbergCement or Lehigh, has any
arrangement in relation to relevant Hanson securities. For these purposes,
"arrangement" includes any indemnity or option arrangement, any agreement or
understanding, formal or informal, of whatever nature, relating to relevant
Hanson securities which may be an inducement to deal or refrain from dealing in
such securities.

Appendix I sets out the Conditions and certain further terms of the Scheme.
Appendix II sets out the bases and sources of certain of the information
contained in this announcement. Appendix III contains certain details relating
to the irrevocable undertakings given by the Hanson Directors. Appendix IV
contains details of the Loan Note Alternative and Appendix V contains the
definitions of certain terms used in this announcement.

Enquiries:

HeidelbergCement Tel: +49 (0) 62 214 810
Dr. Lorenz Naeger, Chief Financial Officer
Dr. Brigitte Fickel, Group Communication & Investor Relations

Deutsche Bank (financial adviser and broker to HeidelbergCement)

Anthony Parsons Tel: +44 (0) 20 7545 8000
James Arculus
Charles Wilkinson (Corporate Broking)
Dr. Berthold Fuerst Tel: +49 (0) 69 910 00
Dr. Alexander Mann

Finsbury (PR adviser to HeidelbergCement) Tel: +44 (0) 20 7251 3801
James Murgatroyd
Mike Smith
Andrew Mitchell

Hanson Tel: +44(0) 20 7245 1245
Charlotte Mulford, Media
Nick Swift, Investor Relations

Rothschild (financial adviser to Hanson) Tel: +44 (0) 20 7280 5000
John Deans
Richard Murley
Ed Welsh

Hoare Govett (corporate brokers to Hanson) Tel: +44 (0) 20 7678 8000
Paul Nicholls
Antonia Rowan

Financial Dynamics (PR adviser to Hanson) Tel: +44(0) 20 7831 3113
Andrew Lorenz
Jon Simmons

(1) The expected synergies have been calculated by HeidelbergCement on the basis
of the existing cost and operating structures of the current HeidelbergCement
Group and Hanson Group. These statements of estimated synergies relate to future
actions and circumstances which, by their nature involve risks, uncertainties,
contingencies and other factors. As a result, the synergies referred to may not
be achieved, or those achieved may be materially different from those estimated.

This announcement is not intended to and does not constitute, or form part of,
any offer or invitation to purchase any securities or the solicitation of any
vote or approval in any jurisdiction pursuant to the Proposals or otherwise. The
Proposals will be made solely through the Scheme Document, which will contain
the full terms and conditions of the Proposals, including details of how to vote
in respect of the Proposals. Any response to the Proposals should be made only
on the basis of the information contained in the Scheme Document.

Deutsche Bank is authorised under German Banking Law (competent authority: BaFin
- Federal Financial Supervising Authority) and with respect to UK commodity
derivatives business by the Financial Services Authority; and is regulated by
the Financial Services Authority for the conduct of UK business. Deutsche Bank
is acting for HeidelbergCement and Lehigh and no one else in connection with the
Proposals and will not be responsible to anyone other than HeidelbergCement and
Lehigh for providing the protections afforded to clients of Deutsche Bank nor
for providing advice in connection with the Proposals.

Rothschild, which is authorised and regulated by the Financial Services
Authority in the United Kingdom, is acting exclusively for Hanson and no one
else in connection with the Proposals and will not be responsible to anyone
other than Hanson for providing the protections offered to clients of Rothschild
nor for providing advice in relation to the Proposals or any other matters
referred to in this announcement.

Hoare Govett is acting as sole corporate broker to Hanson, and no one else in
connection with the Proposals and will not be responsible to anyone other than
Hanson for providing the protections afforded to the clients of Hoare Govett nor
for providing advice in relation to the Proposals or any other matter referred
to herein.

The availability of the Proposals to persons who are not resident in the United
Kingdom may be affected by the laws of the relevant jurisdictions. Persons who
are not so resident should inform themselves about and observe any applicable
requirements in those jurisdictions. Further details in relation to overseas
shareholders will be contained in the Scheme Document.

The distribution of this announcement in jurisdictions other than England and
Wales may be restricted by law and therefore persons in such jurisdictions into
whose possession this announcement comes should inform themselves about and
observe such restrictions. Any failure to comply with the applicable
restrictions may constitute a violation of the securities laws of any such
jurisdiction. This announcement has been prepared for the purposes of complying
with English law and the Takeover Code, and the information disclosed may not be
the same as that which would have been disclosed if this announcement had been
prepared in accordance with the laws of jurisdictions outside of England and
Wales.

Hanson will prepare the Scheme Document to be distributed to Shareholders.
HeidelbergCement, Lehigh and Hanson urge Hanson Shareholders to read the Scheme
Document when it becomes available because it will contain important information
relating to the Proposals.

Lehigh reserves the right to elect to implement the acquisition of the Hanson
Shares by way of a takeover offer (as such term is defined in Part 28 of the
Companies Act 2006). In such event, the Offer will be implemented on the same
terms (subject to appropriate amendments), so far as applicable, as those which
would apply to the Scheme, except that the Offer may exclude Hanson Shareholders
resident in certain overseas jurisdictions. If Lehigh exercises its right to
implement the Acquisition by means of the Offer, the Offer will be made in
compliance with applicable laws and regulations.

The Proposals relate to the shares of a UK company and are proposed to be made
by means of a scheme of arrangement under English company law. A transaction
effected by means of a scheme of arrangement is not subject to the tender offer
rules under the Exchange Act. Accordingly, the Scheme is subject to the
disclosure requirements, rules and practices applicable in the United Kingdom to
schemes of arrangement, which differ from the requirements of US tender offer
rules. Financial information included in the relevant documentation will have
been prepared in accordance with accounting standards applicable in the UK and
Germany that may not be comparable to the financial statements of US companies.

This announcement including information included or incorporated by reference in
this announcement includes 'forward-looking statements' under United States
securities laws, including statements about the expected timing of the
Acquisition, the expected effects on Hanson of the Acquisition, anticipated
earnings enhancements, estimated cost savings and other synergies, potential
strategic options, plans for and benefits of integration, estimated future
growth, market position and all other statements in this announcement other than
statements of historical fact. Forward-looking statements include, without
limitation, statements that typically contain words such as 'will', 'may',
'should', 'continue', 'aims', 'believes', 'expects', 'estimates', 'intends',
'anticipates', 'projects', 'plans' or similar expressions. By their nature,
forward-looking statements involve known or unknown risks and uncertainties
because they relate to events and depend on circumstances that all occur in the
future. Actual results may differ materially from those expressed in the
forward-looking statements depending on a number of factors, including, but not
limited to, the satisfaction of the conditions to the Acquisition, future market
conditions, the behaviour of other market participants, an adverse change in the
economic climate, a fluctuation in the level of clients' commercial activity,
appropriate consultation with employee representative bodies, a loss of key
personnel and the extent to which the Hanson and HeidelbergCement businesses are
successfully integrated. Many of these risks and uncertainties relate to factors
that are beyond the companies' abilities to control or estimate precisely, such
as future market conditions and the behaviours of other market participants and,
therefore undue reliance should not be placed on such statements. The
forward-looking statements contained in this announcement are made as of the
date hereof and Hanson, HeidelbergCement and Lehigh assume no obligation and do
not intend publicly to update or revise these forward-looking statements,
whether as a result of future events, new information or otherwise except as
required pursuant to applicable law.

The Loan Notes that may be issued pursuant to the Proposals have not been and
will not be registered under the Securities Act or under the relevant securities
laws of any state or territory or other jurisdiction of the United States.
Accordingly, Loan Notes may not be offered or sold in the United States, except
in a transaction not subject to, or in reliance on an exemption from, the
registration requirements of the Securities Act and such state securities laws.

Any Loan Notes which may be issued pursuant to the Proposals have not been and
will not be registered under the relevant securities laws of Japan and any
relevant clearances and registrations have not been, and will not be, obtained
from the securities commission of any province of Canada. No prospectus in
relation to the Loan Notes has been, or will be, lodged with, or registered
with, the Australian Securities and Investments Commission or the Japanese
Ministry of Finance. Accordingly, unless otherwise determined by Lehigh and
permitted by applicable law and regulation, the Loan Notes may not be offered,
sold, resold, transferred, delivered or distributed, directly or indirectly in
or into Canada, Australia or Japan or any other jurisdiction where to do so
would violate the laws of that jurisdiction or would require registration
thereof in such jurisdiction.

No other listing authority or equivalent has reviewed, approved or disapproved
this announcement, the Proposals or the Loan Notes nor has it expressed a view
on the accuracy or adequacy of this announcement.

Dealing Disclosure Requirements

Under the provisions of Rule 8.3 of the Takeover Code, if any person is, or
becomes, "interested" (directly or indirectly) in 1 per cent. or more of any
class of "relevant securities" of Hanson, all "dealings" in any "relevant
securities" of that company (including by means of an option in respect of, or a
derivative referenced to, any such "relevant securities") must be publicly
disclosed by no later than 3.30 p.m. (London time) on the London business day
following the date of the relevant transaction. This requirement will continue
until the date on which the Scheme becomes effective, lapses or is otherwise
withdrawn or on which the "offer period" otherwise ends. If two or more persons
act together pursuant to an agreement or understanding, whether formal or
informal, to acquire an "interest" in "relevant securities" of Hanson, they will
be deemed to be a single person for the purpose of Rule 8.3.

Under the provisions of Rule 8.1 of the Takeover Code, all "dealings" in
"relevant securities" of Hanson by HeidelbergCement, Lehigh or Hanson, or by any
of their respective "associates", must be disclosed by no later than 12.00 noon
(London time) on the London business day following the date of the relevant
transaction.

A disclosure table, giving details of the companies in whose "relevant
securities" "dealings" should be disclosed, and the number of such securities in
issue, can be found on the Takeover Panel's website at
www.thetakeoverpanel.org.uk.

"Interests in securities" arise, in summary, when a person has long economic
exposure, whether conditional or absolute, to changes in the price of
securities. In particular, a person will be treated as having an "interest" by
virtue of the ownership or control of securities, or by virtue of any option in
respect of, or derivative referenced to, securities.

Terms in quotation marks are defined in the Takeover Code, which can also be
found on the Panel's website. If you are in any doubt as to whether or not you
are required to disclose a "dealing" under Rule 8 you should consult the Panel.

                                   APPENDIX I

                  CONDITIONS TO THE SCHEME AND THE ACQUISITION

The Acquisition will be conditional upon the Scheme becoming unconditional and
becoming effective by not later than 31 December 2007 or such later date (if
any) as Lehigh and Hanson may, with the consent of the Panel, agree (if
required) and the Court approves.

1       Conditions of the Scheme

The Scheme will be conditional upon:

(A) the approval of the Scheme by a majority in number, representing at least
three-fourths in value, of the holders of Hanson Shares, present and voting
either in person or by proxy, at the Court Meeting (or at any adjournment of
such meeting);

(B) the resolution(s) in connection with or required to approve and implement
the Scheme being duly passed by the requisite majority at the EGM (or at any
adjournment of such meeting); and

(C) the sanction (in, either case, with or without modifications on terms
reasonably acceptable to HeidelbergCement and Hanson) of the Scheme and the
confirmation of the reduction of capital involved therein by the Court and
office copies of the Court Orders being delivered for registration to the
Registrar of Companies and registration of the Reduction Court Order with the
Registrar of Companies and, if appropriate, the minute of the reduction attached
to the Reduction Court Order.

2       Conditions of the Acquisition

Lehigh and Hanson have agreed that, subject as stated in paragraph 4 below, the
Acquisition will also be conditional upon, and, accordingly, the necessary
actions to make the Scheme effective will not be taken unless the following
conditions (as amended, if appropriate) are satisfied or waived as referred to
below prior to the Scheme being sanctioned by the Court:

(A) insofar as the Acquisition constitutes a concentration with a Community
dimension within the scope of the Merger Regulation:

(i) the European Commission indicating, in terms reasonably satisfactory to
Lehigh, that it does not intend to initiate proceedings under Article 6(1)(c) of
the Merger Regulation in respect of the proposed acquisition of Hanson by Lehigh
or any matter arising therefrom; and

(ii) the European Commission not having made a referral to a competent authority
of any member state of the European Union under Article 4(4) or Article 9(1) of
the Merger Regulation in respect of all or any part of the proposed acquisition
of Hanson by Lehigh or any matter arising therefrom or, in the event of such a
referral, clearance being obtained from the competent authority of that member
state on terms reasonably satisfactory to Lehigh;

(B) all filings having been made and all or any appropriate waiting periods,
including any extensions thereof, applicable under the US Hart-Scott-Rodino
Antitrust Improvements Act of 1976 (as amended) and the regulations made under
that act having expired, lapsed or been terminated as appropriate in each case
in respect of the Acquisition;

(C) either:

(i) an advance ruling certificate in respect of the Acquisition has been issued
to Lehigh, pursuant to section 102 of the Competition Act (Canada), to the
effect that the Commissioner of Competition ("Commissioner") is satisfied that
they would not have sufficient grounds upon which to apply to the Competition
Tribunal for an order under section 92 of the Competition Act (Canada), or

(ii) the waiting period under section 123 of the Competition Act (Canada) has
expired and Lehigh has been advised in writing that the Commissioner has
determined not to make an application under section 92 or section 100 of the
Competition Act (Canada) in respect of the Acquisition,

and

(iii) with respect to any requisite approval under the Investment Canada Act,
Lehigh has obtained confirmation from the Minister of Industry (or such other
Minister as may be appointed under the Investment Canada Act) under Sections 21,
22 or 23 of the Investment Canada Act that the Minister is, or is deemed to be,
satisfied that the Acquisition is likely to be of net benefit to Canada;

(D) either:

(i) the Treasurer of the Commonwealth of Australia (the "Treasurer") or a
delegate of the Treasurer has provided written advice or confirmation which is
unconditional or subject only to conditions reasonably acceptable to Lehigh that
there is no objection under the Foreign Acquisitions and Takeovers Act 1975
(Commonwealth) or foreign investment policy of Australia to the proposed
Acquisition; or

(ii) the Treasurer has ceased to be empowered to make any order under the
Foreign Acquisitions and Takeovers Act 1975 (Commonwealth) in relation to the
proposed Acquisition;

(E) no government or governmental, quasi-governmental, supranational, statutory,
administrative or regulatory body or association, authority, court, trade
agency, institution or professional or environmental body or any other person or
body in any jurisdiction (each a "Third Party") having, without the consent or
agreement of Lehigh, prior to the Effective Date, decided to take, instituted,
implemented or threatened any action, proceedings, suit, investigation, enquiry
or reference, or made, proposed or enacted any statute, regulation, decision or
order or taken any other steps, and there not continuing to be outstanding any
statute, regulation, decision or order, which would or might be reasonably be
expected to:

(i) impose any limitation on, or result in any delay in, the ability of any
member of the HeidelbergCement Group directly or indirectly to acquire or to
hold or to exercise effectively, directly or indirectly, all or any rights of
ownership of shares in Hanson or on the ability of any member of the wider
Hanson Group or any member of the HeidelbergCement Group to hold or exercise
effectively, directly or indirectly, all or any rights of ownership of shares or
loans or securities convertible into shares or any other securities (or the
equivalent) in any member of the wider Hanson Group or to exercise management
control over any such member of the wider Hanson Group which is material in the
context of the wider Hanson Group taken as a whole;

(ii) other than in implementation of the Proposals and except, where relevant,
pursuant to Part XIIIA of the Companies Act, require any member of the
HeidelbergCement Group to acquire or offer to acquire any shares or other
securities (or the equivalent) or interest in any member of the wider Hanson
Group owned by any third party at a cost which is material in the context of the
wider Hanson Group taken as a whole;

(iii) make the Proposals (including the Reduction of Capital), their
implementation or the Acquisition or proposed acquisition by Lehigh or any
member of the wider HeidelbergCement Group of any shares or other securities in,
or control of, Hanson void, illegal, and/or unenforceable under the laws of any
relevant jurisdiction, or otherwise directly or indirectly, restrain, restrict,
prohibit, delay or otherwise interfere with the same, or impose material
additional conditions or obligations with respect thereto, or otherwise
challenge, hinder or interfere, therewith;

(iv) impose any limitation on the ability of any member of the wider Hanson
Group or the wider HeidelbergCement Group to integrate or co-ordinate its
business, or any substantial part of its business, with the businesses or any
part of the businesses of any other members of the wider HeidelbergCement Group
and/or the wider Hanson Group which is adverse to and material in the context of
the wider Hanson Group or the wider HeidelbergCement Group, as the case may be,
taken as a whole;

(v) result in a member of the wider Hanson Group ceasing to be able to carry on
business under any name which it presently does to an extent which is material
in the context of the wider Hanson Group taken as a whole; or

(vi) otherwise adversely affect the business, assets or profits of any member of
the HeidelbergCement Group or any member of the wider Hanson Group to an extent
which would be material in the context of the Hanson Group taken as a whole,

and all applicable waiting and other time periods during which any Third Party
could decide to take, institute, implement or threaten any such action,
proceeding, suit, investigation or enquiry having expired, lapsed or been
terminated;

(F) all necessary notifications and filings having been made in connection with
the Acquisition and all statutory or regulatory obligations in any relevant
jurisdiction having been complied with in connection with the Acquisition or the
acquisition by any member of the HeidelbergCement Group of any shares or other
securities in, or control of, Hanson and all appropriate waiting periods
(including any extensions thereof) under any applicable legislation or
regulations of any relevant jurisdiction having expired, lapsed or been
terminated and all authorisations, orders, recognitions, grants, consents,
licences, confirmations, permissions, approvals and clearances, including
competition clearances, necessary or reasonably considered necessary or
appropriate for or in respect of the Acquisition and the proposed acquisition of
any shares or other securities in, or control of, Hanson by any member of the
HeidelbergCement Group having been obtained in terms and in a form reasonably
satisfactory to Lehigh from all appropriate Third Parties or persons with whom
any member of the wider Hanson Group has entered into contractual arrangements
and all such authorisations, orders, recognitions, grants, consents, licences,
confirmations, clearances, permissions and approvals, together with all
authorisations, orders, recognitions, grants, licences, confirmations,
clearances, permissions and approvals necessary or reasonably considered
necessary or appropriate to carry on the material business of any member of the
wider Hanson Group, remaining in full force and effect and there being no
intimation of any intention to revoke, suspend, restrict or modify or not to
renew the same at the time at which the Acquisition becomes otherwise
unconditional and all necessary statutory or regulatory obligations in
connection with the Acquisition in any relevant jurisdiction having been
complied with;

(G) save as Publicly Announced by Hanson prior to the date hereof, or as
disclosed in the Annual Report or as can be reasonably demonstrated to have been
fairly disclosed to HeidelbergCement by Hanson prior to the date hereof or
included herein, there being no provisions of any arrangement, agreement,
licence, permit or other instrument to which any member of the wider Hanson
Group is a party or by or to which any such member or any of its assets are
bound, entitled or subject and which, in consequence of the Proposals, the
proposed acquisition of any shares or other securities in Hanson or because of a
change in the control or management of Hanson or otherwise, would or might
reasonably be expected to result in:

(i) any monies borrowed by, or any other indebtedness (actual or contingent) of,
any such member being or becoming repayable or being capable of being declared
repayable prior to their stated maturity or the ability of any such member to
borrow monies or incur any indebtedness being withdrawn or inhibited or being
capable of becoming or being withdrawn or inhibited;

(ii) the creation or enforcement of any mortgage, charge or other security
interest over the whole or any part of the business, property or assets of any
such member or any such security (whenever arising or having arisen) being
enforced or becoming enforceable;

(iii) any such arrangement, agreement, licence, permit or other instrument of
any such member being terminated or adversely modified or any action being taken
or any obligation or liability arising thereunder;

(iv) any assets or interest of any such member being or falling to be disposed
of or any right arising under which any such asset could be required to be
disposed of;

(v) the rights, liabilities, obligations, interests or business of any such
member in or with any person, firm or body or, in the case of a business any
arrangements relating to such interest or business, being terminated or
adversely modified or affected;

(vi) any such member ceasing to be able to carry on business under any name
under which it presently does so;

(vii) the value of such member or its financial or trading position or profits
being prejudiced or adversely affected; or

(viii) the creation of any liability, actual or contingent, by any such member,

and which in each such case would be material in the context of the Hanson Group
taken as a whole, and no event having occurred which, under any provision of any
agreement, arrangement, licence, permit, or other instrument to which any member
of the wider Hanson Group is a party or by or to which any such member or any of
its assets is bound, entitled or subject, is likely to result in any of the
events or circumstances as are referred to in sub-paragraphs (i) to (viii) of
this paragraph (G) and which in each such case would be material in the context
of the Hanson Group taken as a whole;

(H) save as Publicly Announced by Hanson prior to the date hereof, or as can be
reasonably demonstrated to have been fairly disclosed to HeidelbergCement by
Hanson prior to the date hereof or as disclosed in the Annual Report or included
herein, no member of the wider Hanson Group having, since 31 December 2006:

(i) issued or agreed to issue or authorised or proposed the issue or grant of
additional shares or securities of any class, or securities convertible into, or
exchangeable for, or rights, warrants or options to subscribe for or acquire,
any such shares, securities or convertible securities (save for any transactions
between members of the wider Hanson Group, and any Hanson Shares allotted upon
exercise of options granted or awards made, prior to the date hereof under the
Hanson Share Schemes);

(ii) recommended, declared, paid, made or proposed to declare, pay or make any
bonus, dividend or other distribution whether in cash or otherwise, other than
transactions between members of the wider Hanson Group and which in any such
case is material in the context of the Hanson Group taken as a whole;

(iii) made, authorised, proposed or announced its intention to propose any
merger or demerger or acquisition or disposal of assets or shares or any change
in its share or loan capital (other than transactions between members of the
wider Hanson Group) and which in any such case is material in the context of the
Hanson Group taken as a whole;

(iv) disposed of or transferred, mortgaged or encumbered any asset or any right,
title or interest in any asset (other than transactions between wholly owned
members of the Hanson Group) which, in any such case, is material in the context
of the Hanson Group taken as a whole;

(v) proposed or entered into any contract, any reconstruction or amalgamation,
any transaction or arrangement otherwise than in the ordinary course of business
(other than transactions between members of the wider Hanson Group) which, in
any such case, is material in the context of the Hanson Group taken as a whole;

(vi) entered into or varied, or made any offer (which remains open for
acceptance) to enter into or vary, the terms of any service agreement or
arrangement with any of the directors of Hanson;

(vii) proposed or entered into any agreement which consents to the restriction
of the scope of the business of any member of the wider Hanson Group and which
in any such case is material in the context of the Hanson Group taken as a
whole;

(viii) waived, settled or compromised any claim to an extent which is material
in the context of the Hanson Group taken as a whole;

(ix) entered into or varied or authorised or proposed any contract, arrangement,
transaction or commitment (whether in respect of capital expenditure or
otherwise) which is of a long term, onerous or unusual nature or magnitude or
which is or is likely to be restrictive to the businesses of any member of the
wider Hanson Group or which involves or could involve an obligation of such a
nature or magnitude and which in any such case is material in the context of the
Hanson Group taken as a whole;

(xi) purchased, redeemed, repaid or announced any proposal to purchase, redeem
or repay any of its own shares (including treasury shares) or other securities
or reduced or made or authorised any other change to any part of its share
capital (other than transactions between members of the wider Hanson Group);

(xii) taken any corporate action or had any steps taken or legal proceedings
started or threatened against it for its winding-up (voluntary or otherwise),
dissolution or reorganisation or for the appointment of a receiver,
administrative receiver, administrator, trustee or similar officer of all or any
of its assets or revenues which in any such case is material in the context of
the Hanson Group taken as a whole or any analogous proceedings in any
jurisdiction or had any such person appointed;

(xiii) implemented, or authorised, proposed or announced its intention to
implement, any reconstruction, amalgamation, scheme, commitment or other
transaction or arrangement otherwise than in the ordinary course of business
(otherwise than between Hanson and members of the wider Hanson Group) and which
in any such case is material in the context of the Hanson Group taken as a
whole;

(xiv) merged with any body corporate or acquired or disposed (in either case
otherwise than in the ordinary course of trading) of any assets (including
shares in subsidiaries, associates and trade investments) or made any change in
its share or loan capital, or authorised or proposed or announced any intention
to propose any merger, de-merger, acquisition, disposal or change as aforesaid
(otherwise than between Hanson and members of the wider Hanson Group) and which
in any such case is material in the context of the Hanson Group taken as a
whole; or

(xv) entered into any contract, commitment, arrangement or agreement otherwise
than in the ordinary course of business or passed any resolution or made any
offer (which remains open for acceptance) with respect to or announced any
intention to, or to propose to, effect any of the transactions, matters or
events referred to in this condition (otherwise than between Hanson and members
of the wider Hanson Group) and which in any such case is material in the context
of the Hanson Group taken as a whole;

(I) save as Publicly Announced by Hanson prior to the date hereof, or as can be
reasonably demonstrated to have been fairly disclosed to HeidelbergCement by
Hanson prior to the date hereof, or as disclosed in the Annual Report or
included herein, since 31 December 2006:

(i) there having been no adverse change or deterioration having occurred in the
business, assets, financial or trading position or profits of Hanson or any
other member of the wider Hanson Group which in any such case is material in the
context of the Hanson Group taken as a whole;

(ii) there having been no litigation, arbitration proceedings, prosecution or
other legal proceedings to which any member of the wider Hanson Group is or may
become a party (whether as claimant or defendant or otherwise), no such
proceedings having been instituted, announced or threatened by or against or
remaining outstanding against any member of the wider Hanson Group and no
investigation by a Third Party against or in respect of any member of the wider
Hanson Group having been instituted, threatened or announced or remaining
outstanding in respect of any member of the wider Hanson Group (including, other
than as a result of the Acquisition any anti-trust or merger control authority)
which in any such case might be reasonably expected to adversely affect any
member of the wider Hanson Group in any way which is material in the context of
the Hanson Group taken as a whole;

(iii) no steps having been taken which are likely to result in the withdrawal,
cancellation, termination or modification of any licence held by any member of
the wider Hanson Group which is necessary for the proper carrying on by the
Hanson Group of a material part of the business of the wider Hanson Group; and

(iv) no contingent or other liability having arisen which might reasonably be
expected to materially and adversely affect the Hanson Group taken as a whole;

(J) save as Publicly Announced by Hanson prior to the date hereof, or as can be
reasonably demonstrated to have been fairly disclosed to HeidelbergCement by
Hanson prior to the date hereof, or as disclosed in the Annual Report or
included herein, Lehigh not having discovered:

(i) that the financial, business or other information concerning the wider
Hanson Group, as contained in the information publicly disclosed at any time,
either contains misrepresentation of a material fact or omits to state a fact
necessary to make the information contained therein not misleading and which is
material in the context of the wider Hanson Group taken as a whole;

(ii) that any member of the wider Hanson Group is subject to any liability,
contingent or otherwise, which is material in the context of the Hanson Group
taken as a whole;

(iii) that any past or present member of the wider Hanson Group has not complied
with all applicable laws and regulations of any relevant jurisdiction relating
to environmental matters which non-compliance would be likely to give rise to
any liability (whether actual or contingent) which would be material in the
context of the Hanson Group taken as a whole;

(iv) that there has been an emission, disposal, discharge, deposit, spillage or
leak of waste or hazardous or harmful substances on or about or from any
property now or previously owned, occupied or made use of by any past or present
member of the wider Hanson Group which would be likely to give rise to any
liability (whether actual or contingent) or cost which is material in the
context of the Hanson Group taken as a whole;

(v) circumstances exist whereby a person or class of persons would be likely to
have any claim or claims in respect of any defect in a product or a process of
manufacture, or materials used therein, now or previously manufactured, sold or
carried out by any past or present member of the wider Hanson Group, which claim
or claims might adversely affect any member of the wider Hanson Group in any way
which is material in the context of the Hanson Group taken as a whole; and

(vi) that there is or is likely to be any liability (whether actual or
contingent) or requirement to make good, repair, reinstate or clean-up any
property now or previously owned, occupied or made use of by any past or present
member of the wider Hanson Group which is material in the context of the Hanson
Group taken as a whole.

3 For the purposes of the above conditions, "wider Hanson Group" means Hanson,
its subsidiary undertakings, associated undertakings and any other undertaking
in which Hanson and/or such undertakings (aggregating their interests) have a
significant interest, "wider HeidelbergCement Group" means HeidelbergCement,
its subsidiary undertakings, associated undertakings and any other undertaking
in which HeidelbergCement and/or such undertakings (aggregating their interests)
have a significant interest, and for these purposes "subsidiary undertaking",
"associated undertaking" and "undertaking" have the meaning ascribed to them in
the Companies Act 1985 (other than paragraph 20(1)(b) of Schedule 4A to the Act
which shall be specifically excluded for these purposes) and "significant
interest" means an interest(direct or indirect) in 20 per cent. or more of the
equity share capital (as defined in the Companies Act 1985). "Publicly
Announced" means publicly announced by Hanson by either (i) the delivery of
an announcement to a Regulatory Information Service; (ii) the publication of
such information on the main website maintained by Hanson; or (iii) the
publication of such information on the website maintained by the SEC for the
purposes of distributinginformation, in each case with sufficient detail for
a reader to appreciate the nature and scope of the matter involved.

4 Lehigh reserves the right to waive, in whole or in part, all or any of
conditions 2(A)(ii) and (B) to (J) inclusive. Conditions 1(A) to (C) cannot
be waived. Lehigh shall be under no obligation to waive or treat as satisfied
any of such conditions by a date earlier than the latest date specified above
for the satisfaction thereof notwithstanding that the other conditions of the
Scheme or the Acquisition may at such earlier date have been waived or fulfilled
and that there are at such earlier date no circumstances indicating that any
such conditions may not be capable of fulfilment.

5 Save with the consent of the Panel, the Scheme will lapse if, before the date
of the Court Meeting, the Acquisition is referred to the Competition Commission
or the European Commission initiates proceedings under Article 6(1)(c) of the
Merger Regulation in respect of the Acquisition.

6 The Loan Note Elected Shares will be acquired by Lehigh fully paid with full
title guarantee and free from all liens, equitable interests, charges,
encumbrances, rights of pre-emption and other third party rights of any nature
whatsoever and together with all rights attaching to them, including the right
to receive and retain all dividends and distributions (if any) declared, made or
payable after the date of this announcement.

7 If Lehigh is required to make an offer for Hanson Shares under the provisions
of Rule 9 of the Code, Lehigh may make such alterations to any of the above
Conditions as are necessary to comply with the provisions of that rule.

8 Lehigh reserves the right to effect the Acquisition by way of a takeover
offer, in which case additional documents will be despatched to Hanson
Shareholders. In such event, the Offer will be implemented on the same terms
(subject to appropriate amendments, including (without limitation) an acceptance
condition set at 90 per cent. of the Hanson Shares to which the Offer relates
(but capable of waiver on a basis consistent with Rule 10 of the Code), so far
as applicable, as those which would apply to the Scheme).

                                  APPENDIX II

                               BASES AND SOURCES

. The value of approximately £8.0 billion attributed to the fully diluted share
capital of Hanson, is based upon the fully diluted number of Hanson Shares being
approximately 724 million, including some 714 million Hanson Shares in issue on
14 May 2007 (including those represented by ADSs and CDIs but excluding those
held in treasury), adjusted for the dilutive effect of in-the-money options. For
the purposes of this announcement only, it is assumed that all options and
awards to subscribe for Hanson Shares granted under the Hanson Share Schemes
with exercise prices lower than the Price, will become fully vested and
exercisable as a result of the Acquisition. Hanson Shares held in the Hanson
employment benefit trust will be used to satisfy the exercise of options and
awards under the Hanson Share Schemes, with the balance coming from shares
held by Hanson in treasury.

. For the purposes of the financial comparisons contained in this announcement,
no account has been taken of any liability to taxation or the treatment of
fractions under the Acquisition.

. The premiums implied by the Price have been calculated based on closing Hanson
Share prices supplied by Datastream.

. Unless otherwise stated the financial information relating to HeidelbergCement
and Hanson has been extracted without material adjustment from the respective
published audited reports and accounts for the relevant periods.

. All market rankings are on the basis that any potential combination of Cemex
and Rinker has not yet completed and are, where more recent figures were not
readily available, based on 2005 figures.

. For the purposes of calculating the percentage of Hanson Shares held by the
Hanson Directors, Treasury Shares in Hanson have been excluded.


                                  APPENDIX III

                            IRREVOCABLE UNDERTAKINGS


The following Hanson Directors have given irrevocable undertakings as described
in paragraph 13 of this announcement in respect of the number of shares set out
below (and any further shares acquired by them prior to completion of the
Acquisition):

Name                               Number of Hanson Shares
M.W. Welton                        5,000
A.J. Murray                        441,426
W.F. Blount                        1,000
C.J. Brady                         10,000
G.Dransfield                       205,900
W.S.H Laidlaw                      20,000
J.W. Leng                          10,000
The Baroness Noakes                7,600

                                  APPENDIX IV

                    PARTICULARS OF THE LOAN NOTE ALTERNATIVE

The Loan Note Alternative will be conditional upon the Scheme becoming effective
in accordance with its terms, or, if the Acquisition is implemented by way of an
Offer, the Offer becoming unconditional in all respects.

Under the Scheme, US Holders, ADS Holders, CDI Holders and Restricted Overseas
Persons will only be eligible to receive cash consideration, and will not be
eligible to elect to receive Loan Notes as consideration pursuant to the Loan
Note Alternative.

Save as stated below and subject to the terms which will be set out in the
Scheme Document (or, if the Acquisition is implemented by way of an Offer, the
document setting out the Offer), Hanson Shareholders (other than Restricted
Overseas Persons, US Holders, ADS Holders and CDI Holders, who may not
participate in the Loan Note Alternative) may elect to receive Loan Notes
instead of the cash to which they would otherwise have been entitled under the
terms of the Scheme (or Offer) on the basis of £1 in nominal amount of Loan
Notes for every £1 in cash which they would otherwise have received.

The Loan Notes will be issued in integral multiples of £1 and the balance of any
entitlement that is not a whole multiple of £1 will be disregarded and not
issued.

Unless Lehigh decides otherwise, no Loan Notes will be issued by Lehigh unless,
on or before the Loan Note Deadline, the aggregate nominal value of all Loan
Notes to be issued as a result of valid elections for the Loan Note Alternative
exceeds £40 million. If such aggregate is less than £40 million, any such
election shall, unless Lehigh decides (in its sole discretion) otherwise, be
void and the relevant Hanson Shareholders will receive the cash to which they
were entitled absent their election under the Loan Note Alternative.

The Loan Notes will be governed by English law. The Loan Notes will be
obligations of Lehigh, secured by way of a parent company guarantee from
HeidelbergCement. The Loan Notes will bear interest (from the date of issue to
the relevant holder of Loan Notes) payable every six months in arrears on 30
June and 30 December at a rate of 0.5 per cent. below 6 month LIBOR determined
on the first business day of each interest period. The first interest payment
date will be 31 December 2007 in respect of the period up to and including that
date. The Loan Notes will be redeemable for cash at the option of the holders
(subject to certain conditions), in part or in whole, on interest payment dates,
commencing on or after 30 June 2008.

Lehigh may purchase any Loan Notes which have been in issue for more than 6
months at a price by tender available to all holders of Loan Notes alike
(provided that under the terms of such tender offer, no holders of Loan Notes
will be required to sell their Loan Notes to Lehigh), or otherwise by agreement
with any holders of Loan Notes. The Loan Notes may be redeemed in minimum
denominations of £500. If not previously redeemed, the final redemption date
will be 31 December 2011. Any Loan Notes outstanding on the final redemption
date will be redeemed at par together with any accrued interest (less any tax)
on that date.

The Loan Notes will be redeemable in cash at the option of Lehigh, in part or in
whole, on interest payment dates, commencing on 31 December 2009 if the
aggregate nominal amount of Loan Notes outstanding falls below £20 million.

The Loan Notes will not be transferable, other than by a holder of Loan Notes to
a spouse/civil partner, parent, child, certain other family members, or a family
trust, or by the trustee of the Hanson share plans to the relevant beneficial
owner of the Loan Notes. No application will be made for the Loan Notes to be
listed on, or dealt on, any stock exchange or other trading facility.

All dates referred to in this Appendix IV are based on the currently anticipated
timetable for implementation of the Scheme and may be subject to change.

Loan Notes that may be issued pursuant to the Proposals have not been and will
not be registered under the Securities Act or under the relevant securities laws
of any state or territory or other jurisdiction of the United States.
Accordingly, Loan Notes may not be offered or sold in the United States, except
in a transaction not subject to, or in reliance on an exemption from, the
registration requirements of the Securities Act and state securities laws.

Unless Lehigh otherwise determines, the relevant clearances and registrations
have not been, nor will they be, sought or obtained, nor have any steps been
taken, nor will any steps be taken, to enable the Loan Notes to be publicly
offered in compliance with applicable securities laws of Australia, Canada or
Japan (or any province or territory thereof, if applicable) or any other
jurisdiction. Accordingly, the Loan Notes (subject to certain exceptions) may
not be offered, sold, resold, transferred, or delivered, directly or indirectly,
in, into or from, Australia, Canada or Japan or any other jurisdiction where to
do so would violate the laws of that jurisdiction or would require registration
thereof in such jurisdiction. No other listing authority or equivalent has
reviewed, approved or disapproved of this announcement, the Proposals or the
Loan Notes, nor has it expressed a view on the accuracy or adequacy of this
announcement.

Lehigh may, by prior notice in writing to the holder of Loan Notes of not less
than 11 business days, pay to the Loan Note Holder in lieu of and in
satisfaction of the principal amount of the Loan Note to be redeemed, together
with interest accrued up to but excluding the date of repayment, an amount of
Euros equal to the amount in Euros that the sterling amount equal to the amount
of the Loan Note together with interest to be repaid, could have purchased on
the date 11 Business Days before the date of repayment at the spot rate for the
purchase of Euros with sterling certified by Lehigh as prevailing at 11.00 a.m.
(London time), on that day, rounded if necessary to the nearest cent (half a
cent being rounded upwards) provided that the principal amount repaid shall be
no less or more than (and if it would otherwise be, shall be equal to) 99.75 per
cent. or 100.25 per cent of the amount in Euros that the sterling amount of the
principal to be repaid could have purchased on the date of the repayment (at the
rate certified by Lehigh in accordance with the terms set out above). The
certificate of Lehigh shall, in the absence of manifest error, be final and
binding.

The Loan Note Alternative will be conditional upon the Scheme becoming
unconditional and effective and will remain open for election until the Loan
Note Deadline.

Full details of the Loan Notes and the Loan Note Alternative will be contained
in the Scheme Document.

                                   APPENDIX V

                                  DEFINITIONS

The following definitions apply throughout this announcement, unless the context
requires otherwise:

"Acquisition"             the acquisition of the entire issued and to be issued share
                          capital of Hanson (including such share capital held in the
                          form of ADSs and CDIs) and for the avoidance of doubt includes
                          an acquisition of the Hanson Shares implemented by way of the
                          Scheme, or the Offer;

"Act" or "Companies Act"  the Companies Act 1985, as amended;

"ADS" or "Hanson ADS"     an American depositary share, evidenced by an American
                          depositary receipt representing five Hanson Shares, issued
                          by the ADS Depositary in accordance with the deposit
                          agreement;

"ADS Depository"          Citibank N.A., as depositary under the deposit agreement;

"ADS Holder"              a holder of Hanson ADSs;

"Alternative Proposal"    means any proposal put forward by any third party which
                          is not acting in concert with HeidelbergCement for (i) a merger,
                          acquisition or other business combination, scheme of arrangement,
                          exchange offer, liquidation or takeover offer involving Hanson or
                          all or substantially all of the business of the Hanson Group, or
                         (ii) any proposal to acquire in any manner, directly or
                          indirectly, an equity interest of more than 50 per cent. or more
                          in any voting securities of Hanson, or all or a substantial portion
                          of the assets of the Hanson Group;

"Annual Report"           the annual report and accounts of Hanson for the financial year
                          ended 31 December 2006;

"ASX"                     ASX Limited, operating under the brand name Australian Securities
                          Exchange;

"Australia"               the Commonwealth of Australia, its territories and possessions and
                          all areas subject to the jurisdiction and all political sub
                          divisions thereof;

"business day"            any day other than a Saturday, Sunday and public holiday on which
                          banks are generally open for business in London and Frankfurt;

"Canada"                  Canada, its provinces and territories and all areas subject to its
                          jurisdiction and all political sub divisions thereof;

"Cancellation Shares"     Scheme Shares other than Loan Note Elected Shares;

"Cemex"                   Cemex S.A. B de C.V.;

"CDIs"                    CHESS depository interests, representing a unit of beneficial
                          interest in one Hanson Share;

"CDI Holders"             holders of CDIs;

"Conditions"              the conditions to the Acquisition set out in Appendix I and
                          contained in full in the Scheme Document;

"Company" or "Hanson"     Hanson PLC, a company incorporated in England and Wales
                          under the Companies Act with registration number 4626078;

"Competing Proposal"      any proposal put forward by any third party which is not
                          acting in concert with HeidelbergCement, in respect of, or for:
                          (i) a takeover offer (whether or not subject to pre conditions)
                          or possible offer for, the issued ordinary share capital of
                          Hanson or the sale, or possible sale, (in one transaction or a
                          series of transactions) of the whole of the assets or undertaking
                          of the Hanson Group, or any part of the same which is material in
                          the context of the Hanson Group; (ii) a merger, acquisition or
                          other business combination, scheme of arrangement, exchange offer,
                          or liquidation involving Hanson or all or substantially all of the
                          business of the Hanson Group; (iii) any proposal which would, if
                          implemented result in a change of control of Hanson; or (iv) any
                          other transactions having a similar effect, the consummation
                          of which is reasonably likely to prevent, or impede, interfere
                          with or delay to any material extent the Acquisition, in each case
                          howsoever it is proposed that such offer or proposal be implemented;

"Court"                   the High Court of Justice in England and Wales;

"Court Meeting"           the meeting of the Scheme Shareholders that is proposed to be
                          convened by order of the Court pursuant to section 425 of the Act,
                          notice of which will be set out in the Scheme Document for the
                          purposes of considering and if thought fit, approving the Scheme,
                          including any adjournment thereof;

"Court Orders"            the Reduction Court Order and the Scheme Court Order;

"CREST"                   the relevant system (as defined in the CREST Regulations) in respect
                          of which CRESTCo Limited is the Operator (as defined in the CREST
                          Regulations) in accordance with which listed securities may be held
                          and transferred in uncertificated form;

"CREST Regulations"       the Uncertificated Securities Regulations 2001 (SI 2001 No. 3755) as
                          amended from time to time;

"Deutsche Bank"           Deutsche Bank AG, financial adviser to HeidelbergCement;

"EBITDA"                  Earnings before income, tax, depreciation and amortisation;

"Effective Date"          the date on which (i) the Scheme becomes effective by
                          registration of the Court Orders by the Registrar of Companies and
                          issue by the Registrar of Companies of a certificate under section
                          138 of the Companies Act in relation to the reduction of share
                          capital associated with the Scheme; or (ii) if Lehigh elects to
                          implement the Acquisition by way of the Offer, such Offer becoming
                          or being declared unconditional in all respects;

"EGM Resolution"          the special resolution to approve, amongst other things, the
                          alteration of Hanson Articles and such other matters as may be necessary
                          to implement the Scheme and the de-listing of Hanson Shares;

"Exchange Act"            the United States Securities Exchange Act of 1934, as amended,
                          and the rules and regulations promulgated thereunder;

"Extraordinary General
Meeting" or or "EGM"      the extraordinary general meeting of Hanson that is proposed to be
                          convened in connection with the Scheme and the Reduction of Capital,
                          notice of which will be set out in the Scheme Document, including any
                          adjournment thereof;

"Facilities Agreement"    the £8.75 billion and €3.4 billion multicurrency term and
                          revolving facilities agreement, in respect of a multi-tranche syndicated
                          credit facility, incorporating a Euro swingline facility between, among
                          others, HeidelbergCement, The Royal Bank of Scotland and Deutsche Bank
                          dated 14 May 2007;

"Hanson Articles"         the articles of association of Hanson;

"Hanson Board"            the board of directors of Hanson;

"Hanson Directors"        the directors of Hanson from time to time;

"Hanson Group"            Hanson, its subsidiaries and subsidiary undertakings from time to
                          time and "member of the Hanson Group" shall be construed accordingly;

"Hanson Shareholders"     holders of Hanson Shares;
or "Shareholders"

"Hanson Share Schemes"    the Hanson Sharesave Scheme, the Hanson Executive Share Option Scheme
                          1997, the Hanson plc Share Option Plan 2001, the Hanson Executive
                          Share Option Plan 2003, the Hanson Long Term Incentive Plan 2003 and
                          the Hanson Long Term Incentive Plan 2006;

"Hanson Shares"           ordinary shares of 10 pence each in the capital of Hanson;

"HeidelbergCement"        HeidelbergCement AG, a company registered in Germany;

"HeidelbergCement Finance
 B.V."                    HeidelbergCement Finance B.V., a company incorporated in The
                          Netherlands with registered number 33232885 0000;

"HeidelbergCement Group"  HeidelbergCement, its subsidiaries and its subsidiary
                          undertakings from time to time and "member of the HeidelbergCement
                          Group" shall be construed accordingly;

"Implementation Agreement" the agreement between HeidelbergCement, Lehigh and Hanson dated 15
                           May 2007 relating to, amongst other things, the implementation
                           of the Scheme, further details of which are set out in paragraph 15
                           of this announcement;

"Inducement Fee"          a fee of £78.7 million;

"Japan"                   Japan, its cities and prefectures, territories and possessions;

"Lehigh"                  Lehigh UK Limited a company incorporated in England and Wales under the
                          Companies Act with registered number 4113976;

"Listing Rules"           the Listing Rules of the UK Listing Authority;

"Loan Note Alternative"   the alternative available under the Scheme whereby Hanson Shareholders
                          (other than Restricted Overseas Persons, US Holders, ADS Holders and CDI
                          Holders) may elect, subject to certain limitations and conditions, to
                          receive Loan Notes instead of all or part of the cash consideration to
                          which they would otherwise be entitled pursuant to the Scheme;

"Loan Note Deadline"      3.00 p.m. on the business day immediately prior to the Scheme Hearing;

"Loan Note Elected Shares" Scheme Shares (if any) in respect of which valid elections have been
                           made under the Loan Note Alternative in accordance with its terms;

"Loan Notes"              the loan notes to be issued by Lehigh pursuant to the Loan Note
                          Alternative and to be guaranteed by HeidelbergCement;

"London Stock Exchange"   London Stock Exchange plc;

"Merger Regulation"       Council Regulation (EC) No. 139/2004;

"Offer"                   should Lehigh elect to effect the Acquisition by way of a takeover
                          offer, the offer to be made by or on behalf of Lehigh for all of the
                          Hanson Shares on the terms and subject to the conditions to be set
                          out in the related offer document and form of acceptance including,
                          where the context requires, any subsequent revision, variation,
                          extension or renewal thereof;

"Panel" or "Takeover
 Panel"                   the UK Panel on Takeovers and Mergers;

"Price"                   the amount of 1100 pence for each Hanson Share;

"Proposals"               the proposed acquisition of the Hanson Shares by Lehigh to be
                          effected by means of the Scheme, (or, should Lehigh so elect, by means
                          of the Offer);

"Reduction Court Order"   the order of the Court confirming the reduction of share capital of Hanson
                          under section 137 of the Companies Act provided for by the Scheme;

"Reduction Hearing"       the hearing by the Court of the petition to confirm the reduction of
                          share capital of Hanson under section 137 of the Companies Act
                          provided for by this Scheme, at which the Reduction Court Order is expected
                          to be granted;

"Reduction of Capital"    the reduction of the share capital of Hanson by the cancellation of the
                          Scheme Shares, to be effected as part of the Scheme;

"Registrar of Companies" the Registrar of Companies in England and Wales;

"Regulatory Information
Service"                 any of the services set out in Appendix III to the Listing Rules from time
                         to time;

"Restricted Overseas
Persons"                 a person (including an individual, corporation, partnership, unincorporated
                         syndicate, limited liability company, unincorporated organisation, trust,
                         trustee, executor, administrator or other legal representative) in, or resident
                         in, or any person whom Lehigh believes to be in, or resident in, Australia,
                         Canada or Japan and any custodian, nominee or trustee holding Hanson Shares
                         for persons in or resident in Australia, Canada, or Japan and who elects to
                         receive the Loan Note Alternative in respect of their Hanson Shares and persons
                         in any other jurisdiction (other than persons in the UK) whom Lehigh is advised
                         to treat as restricted overseas persons in order to observe the laws of such
                         jurisdiction or to avoid the requirement to comply with any governmental or
                         other consent or any registration, filing or other formality which Lehigh regards
                         as unduly onerous;

"Rinker"                 Rinker Group Limited;

"Rothschild"             N M Rothschild & Sons Limited, New Court, St. Swithin's Lane, London EC4P 4DU,
                         financial advisers to Hanson;

"Royal Bank of Scotland"  The Royal Bank of Scotland Group plc;

"Scheme" or "Scheme of
Arrangement"             the scheme of arrangement proposed to be made under section 425 of the Act
                         between Hanson and Hanson Shareholders, incorporating the Reduction of Capital,
                         to be set out in full in the Scheme Document, with or subject to any modification,
                         addition or condition approved or imposed by the Court;

"Scheme Conditions"      the conditions of the Scheme as set out in Appendix I to this announcement and
                         to be set out in full in the Scheme Document;

"Scheme Court Order"     the order of the Court sanctioning the Scheme pursuant to section 425 of the
                         Companies Act;

"Scheme Document"        the circular in respect of the Scheme to be despatched to Hanson Shareholders
                         and others, setting out amongst other things, the full terms and conditions to
                         implementation of the Scheme as well as the Scheme itself and the notice of
                         meeting of each of the Court Meeting and the EGM;

"Scheme Hearing"         the hearing by the Court of the petition to sanction the Scheme, at which the
                         Scheme Court Order is expected to be granted;

"Scheme Record Date"     6:00 pm (London time) on the day immediately before the date of the Reduction
                         Hearing;

"Scheme Shareholders"    holders of Scheme Shares;

"Scheme Shares"          all Hanson Shares which are:

                         (a) in issue at the date of the Scheme Document;

                         (b) (if any) issued after the date of the Scheme Document and before the
                         Voting Record Time; or

                         (c) (if any) issued on or after the Voting Record Time and prior to 6.00 p.m.
                         on the Scheme Record Date, on terms that the holder thereof shall be bound by
                         the Scheme, or in respect of which the original or any subsequent holder thereof
                         agrees in writing to be bound by the Scheme

                         but excluding any Hanson Shares held by Lehigh, or by Hanson (unless Hanson and
                         Lehigh agree otherwise);


"Securities Act"        the United States Securities Act of 1933, as amended and the rules and regulations
                        promulgated thereunder;

"Takeover Code" or
"Code"                  the City Code on Takeovers and Mergers;

"Treasury Shares"       shares held as treasury shares as defined in Section 162A(3) of the Companies Act;

"UK Listing Authority"
or "UKLA"               the Financial Services Authority in its capacity as the competent authority for
                        listing in the United Kingdom under Part VI of the Financial Services and Markets
                         Act 2000;
"uncertificated" or
"in uncertificated form"   a share or other security which is recorded on the register of shareholders of
                          Hanson as being held in uncertificated form (that is, in CREST) and title to which,
                          by virtue of the CREST Regulations, may be transferred by means of CREST;

"United Kingdom" or "UK"  the United Kingdom of Great Britain and Northern Ireland;

"United States" or "US"   United States of America, its territories and possessions, any state of the United
                          States and the District of Columbia;

"US Holder"              holders of Hanson Shares in the United States or with a registered address in the
                         United States, and any custodian, nominee or trustee holding Hanson Shares for
                         persons in the United States or with a registered address in the United States;

"VAT"                    value added tax in the UK including any similar tax which may be imposed in place
                         thereof in the UK from time to time;

"Voting Record Time"     the time and date specified in the Scheme Document by reference to which entitlement
                         to vote on the Scheme will be determined, expected to be 6.00 p.m. (London time) on
                         the day which is two days before the date of the Court Meeting or, if the Court
                          Meeting is adjourned, 6.00 p.m. on the day which is two days before the date of
                          such adjourned Court Meeting;

"£","GPB,
"sterling" and "pence"  the lawful currency of the UK;

"€" or "Euro"      the lawful currency of the EU; and

"$", "US$", "USD" and
"US dollars"            United States dollars, the lawful currency of the United States.


 

 

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorised.

                                                                        HANSON PLC           

                                                          By:           /s/ Graham Dransfield     

                                                                        Graham Dransfield
                                                                         Legal Director

Date:    May 15, 2007