Long-Term Incentive Plan

Costain Group PLC
30 April 2004

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 2,040,292 ordinary shares of 10p each made on 21 April 2004 under the
Costain Group PLC Long-Term Incentive Plan (LTIP). 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 2007. Awards were made to the
following Executive Directors:


Name                                          Number of Shares subject to Award

Stuart J Doughty, Chief Executive             417,910
Charles J McCole, Finance Director            229,850


Other awards were made on 21 April 2004 under the LTIP to employees who are not
Executive Directors of the Company

                                                                   30 April 2004


Enquiries:

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

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



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