Scrip Dividend Reference Price

RNS Number : 4381F

Costain Group PLC

26 April 2011

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

The Company announces that the Scrip Dividend Reference Price for the fully paid shares in the Company to be issued to shareholders who elect to receive the scrip dividend alternative for the final dividend for the year ended 31 December 2010 is 233.35 pence per ordinary share of 50 pence each.

The Scrip Reference Price has been calculated in the usual way as the average of the middle market quotations for the Company's shares as derived from the Daily Official List of the London Stock Exchange for the five business days commencing on the ex-dividend date. The Company's ordinary shares were marked ex-dividend on 13 April 2011.

Further Information

Shareholders wishing to receive the scrip dividend in respect of the final dividend for the year ended 31 December 2010 and who have not already submitted a mandate form, should return a mandate form to Equiniti Limited, Share Dividend Team, Aspect House, Spencer Road, Lancing, West Sussex BN99 6DA to arrive no later than 27 April 2011.

Mandate forms and the scrip dividend booklet containing the terms of the Company's scrip dividend scheme are set out on the Company's website at:

http://www.costain.com/investors/shareholder-details/dividend-history.aspx

If you have already completed a valid scrip dividend mandate form, it will remain valid until you cancel your election and you need not return any documentation to receive this scrip dividend.

The final dividend for the year ended 31 December 2010, including the scrip dividend, will be paid on 20 May 2011 (the dividend payment date) to the ordinary shareholders of the Company on the register at close of business on 15 April 2010 (the record date).

For further information please contact Equiniti on 0871 384 2270. Calls to this number are charged at 8p per minute from a BT landline. Other telephony provider costs may vary.

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