Long-Term Incentive Plan

Costain Group PLC
24 April 2006

Costain Group PLC

(the 'Company')



Long-Term Incentive Plan



The Company announces details of an award in the form of an option with an
exercise price of £1 per exercise (whether on exercise of the entire award or
any part of it) over 3,818,449 ordinary shares of 5p each made on 21 April 2006
under the Costain Group PLC Long-Term Incentive Plan (LTIP). The award can only
be exercised on the achievement of specified performance conditions after the
end of the Company's financial year ending 31 December 2009. An award was made
to the following Executive Director:



Name                                       Number of Shares subject to Award

Andrew Wyllie, Chief Executive             607,477



Other awards were made on 21 April 2006 under the LTIP to employees who are not
Executive Directors of the Company





                                                                   24 April 2006



Enquiries:

College Hill                Tel: [phone]     [e-mail]
Mark Garraway


Costain Group PLC           Tel: [phone]      [e-mail]
Clive L Franks, 
Company Secretary




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