Appointment of new Chairman

Costain Group PLC
23 November 2007



COSTAIN GROUP PLC
('Costain' or 'the Group')


Appointment of new Chairman


The Board of Costain announces that David Allvey 62 is to become Chairman of the
Group with effect from 1 January 2008, when David Jefferies 73 will retire from
the Board.

Mr Jefferies, who joined the Board as Chairman on 6 June 2001, has decided to
retire having overseen a significant period in the Group's development
culminating in the appointment of a new management team to take the business
forward, a recent successful fund raising and the announcement of the intention
to return to the dividend list.

Mr Allvey, recently appointed a deputy Chairman of the Group, joined the Board
on 1 November 2001 and is currently Chairman of the Audit Committee.  He is also
Chairman of Arena Coventry Ltd as well as a non-executive Director of Intertek
Plc, Resolution Plc, Thomas Cook Group Plc and William Hill Plc.

The Board also expects to announce in due course the appointment of a new
non-executive Director who will succeed Mr Allvey as Chairman of the Audit
Committee.



David Jefferies commented:

'The time is right to hand over the reins. Costain has a new management team in
place, a focussed strategy delivering results and a much strengthened balance
sheet available to facilitate future growth opportunities. I am proud to have
played a part in Costain's development and I wish everyone at the Company well
for the future.'



David Allvey commented:

'David has played a key part in establishing a platform for the next phase of
the Group's growth. On behalf of everyone at Costain, I would like to pay
tribute to David and to thank him for all his hard work and unstinting effort in
ensuring a bright outlook for Costain. We wish David, and his wife, Jean, all
the very best for the future. I look forward to leading the Group into the next
phase of its development.'



23 November 2007


ENQUIRIES:

Costain Group PLC                                             Tel: [phone]
Graham Read, Public Relations

College Hill                                                  Tel: [phone]
Mark Garraway
Matthew Gregorowski




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