Holding(s) in Company

Costain Group PLC
14 September 2005


Costain Group PLC
('Costain')

Costain announces that it has been notified on 13 September 2005 that UBS AG no
longer have a notifiable interest in Costain's shares.


                                                               14 September 2005

Enquiries:

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

College Hill                                 Tel: [phone]
Mark Garraway
Matthew Gregorowski


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