Holding(s) in Company

Costain Group PLC
12 August 2005



Costain Group PLC
('Costain')

Costain announces that it has been notified on 11 August 2005 that Artemis UK
Growth Fund no longer have a notifiable interest in Costain's shares.

                                                                  12 August 2005


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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