Long term incentive plan

Costain Group PLC
22 April 2008



Costain Group PLC
('Costain' or the 'Company')

Long-Term Incentive Plan

The Company announces details of Awards in the form of options with an exercise
price of £1 per exercise (whether on exercise of the entire Award or any part of
it) over 2,453,607 ordinary shares of 5p each made on 21 April 2008 under the
Costain Group PLC Long-Term Incentive Plan.  The Awards can only be exercised on
the achievement of specified performance conditions after the end of the
Company's financial year ending 31 December 2010.  Awards were made to the
following Executive Directors:

Name                                             Number of
                                       Shares subject to the Award

Mr A Wyllie, Chief Executive                     1,546,391

Mr A O Bickerstaff, Finance Director               907,216



                                                                   22 April 2008

Enquiries:
Costain Group PLC                                              Tel: [phone]
Clive L Franks

College Hill                                                  Tel: [phone]
Mark Garraway
Adam Aljewicz




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