Bristol Water Partnership

Costain Group PLC
09 June 2005

Costain Group PLC

('Costain')


Preferred Partner for Bristol Water


Costain announces that it has been selected by Bristol Water as its preferred
partner on its AMP4 programme under a five year framework agreement.

The programme will include Bristol Water's treatment works, reservoirs, trunk
mains and pumping station improvements.  The capital value of the contract to
Costain and its supply chain partners, Purac and Black and Veatch Consulting, is
approximately £50 million over the five year period, subject to performance
reviews.

The selection as preferred partner follows an extensive tendering process by
Bristol Water and final selection was based on Costain's ability to deliver long
term service quality to Bristol Water's customers.

Stuart Doughty, Chief Executive of Costain, said:

'We are delighted to have been selected as preferred partner by Bristol Water.
Costain has built a pre-eminent position in the water industry and is now widely
recognised as partner of choice.'


                                                                     9 June 2005


Enquiries:

Costain Group PLC                                             Tel: [phone]
Stuart Doughty, Chief Executive
Graham Read, Public Relations

College Hill                                                  Tel: [phone]
Mark Garraway
Matthew Gregorowski


                      This information is provided by RNS
            The company news service from the London Stock Exchange                 DAAK