Board appointment

Costain Group PLC
25 July 2007



Costain Group PLC

('Costain' or the 'Group')





Board Changes





The Board of Costain is pleased to announce that it has appointed Mike Alexander
to the Board as an independent non-executive director, effective today.



Mike (59) was Chief Executive of British Energy plc between 2003 and 2005 and
prior to that Chief Operating Officer of Centrica plc, having held a number of
senior positions within British Gas plc including Managing Director, British Gas
Trading and Commercial Director, British Gas Exploration & Production.  Before
joining British Gas in 1991, he spent 11 years at BP plc in various roles.



Mike is a non-executive director of Associated British Foods plc and an
independent non-executive director on the Payments Council and has previously
held non-executive chairman positions at both GT Solar International Inc. and
Goldfish Bank Ltd.  He was also previously non-executive director of The Energy
Savings Trust Ltd.  There are no details to report in respect of Listing Rule
9.6.13 (2) to (6).



David Jefferies, Chairman of Costain, commented:



'We are delighted that Mike is joining the Costain Board.  His wealth of
experience and knowledge of the energy sector will be a major benefit to the
Group and we look forward to working with him.'



The Company also announces that David Allvey and Mohd Hussein Hamid have been
appointed joint Deputy Chairmen with immediate effect.





                                                                    25 July 2007




ENQUIRIES:
Costain Group PLC                                    Tel: [phone]
Graham Read, Public Relations
Clive Franks, Company Secretary

College Hill                                         Tel: [phone]
Matthew Gregorowski




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