Rule 2.10 Announcement

Balfour Beatty PLC
10 January 2006


10 January 2006


          Balfour Beatty plc ('Balfour Beatty') - Rule 2.10 Disclosure
          ============================================================

Further to the announcements on 12 December 2005 and 9 January 2006, and in
accordance with Rule 2.10 of the City Code on Takeovers and Mergers, Balfour
Beatty confirms that it has 427,160,822 ordinary shares of 50 pence each in
issue and 129,109,615 cumulative convertible redeemable preference shares of 1
pence each in issue.

The International Securities Identification Number (ISIN) for the Company's
ordinary shares is GB000961622 and for the Company's cumulative convertible
preference shares is GB00097820.

Dealing Disclosure Requirements
-------------------------------

Please note that certain aspects of the rules on disclosure of the City Code on
Takeovers and Mergers (the 'Code') have changed since 7 November 2005. The
following represents a current summary of the position.

Under the provisions of Rule 8.3 of the Code, if any person is, or becomes,
'interested' (directly or indirectly) in 1% or more of any class of 'relevant
securities' of Balfour Beatty or of Mowlem, 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 pm (London time) on the London business day
following the date of the relevant transaction. This requirement will continue
until the date on which the offer becomes, or is declared, unconditional as to
acceptances, lapses or is otherwise withdrawn or on which the 'offer period'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
Balfour Beatty or Mowlem, 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 Code, all 'dealings' in 'relevant
securities' of Balfour Beatty or of Mowlem by Balfour Beatty or Mowlem, 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 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.

Under Rule 8.1 of the Code, both the ordinary shares and the cumulative
convertible redeemable preference shares of Balfour Beatty plc are 'relevant
securities'.


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