Board Change and Appointment

Costain Group PLC
19 July 2004


Costain Group PLC
('Costain' or the 'Company')

Board Change and Appointment of Deputy Chairman

Dato' Abdul Wahid Omar, a nominee of UEM Builders Berhad, has resigned as Deputy
Chairman and a Non-Executive Director of the Company with effect from 16 July
2004, following his appointment as Group Chief Executive Officer of Telekom
Malaysia.

Costain announces that Mr Ahmad Pardas Senin, a nominee of UEM Builders Berhad
has been appointed to the Board of Costain as a Non-Exexutive Director with
effect from Friday 16 July 2004.  Mr Senin has not held a Directorship in a
public quoted company on the London Stock Exchange in the last five years.
There are no details to report in respect of Paragraphs 6.F2 (b) to (g) of the
Listing Rules.  Mr Senin is the Managing Director/Chief Executive of United
Engineers (Malaysia) Berhad, the Malaysian infrastructure development
conglomerate.  Concurrently, Mr Senin is serving as the Managing Director/Chief
Executive Officer of UEM World Berhad, Executive - Vice Chairman of PLUS
Expressways Berhad, a Non-Executive Director of UEM Builders Berhad and
Pharmaniaga Berhad all of which are companies listed on the Malaysian Securities
Exchange.

Mr Ahmad Pardas Senin was elected Deputy Chairman of the Company on Friday 16
July 2004.

                                                                    19 July 2004

Enquiries:

Costain Group PLC                           Tel: [phone]
Stuart J Doughty
Graham Reed

College Hill                                Tel: [phone]
Mark Garraway
Matthew Gregorowski



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