Voting results of AGM

Costain Group PLC
02 May 2006


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


Voting Results of the Costain AGM


                                               Costain Group PLC

Meeting Date:                                       27/04/2006

Number of cards (shareholders) at meeting date:

Issued share capital at meeting date:              357,063,626 ordinary shares of 5p each

Number of votes per share:                                 one

Meeting type AGM/EGM:                                      AGM



Resolution  (No. as noted on proxy form)            Shares For         Shares      Shares   Shares Marked Poll Yes/
                                                                Discretionary     Against        As Votes        No
                                                                                               Withheld /
                                                                                              Abstentions

1 Adoption of Directors Report and Audited          51,378,111        436,184       8,847                        No
accounts for the year ended 31 December 2005

2 Adoption of the Directors' Remuneration           51,159,922        497,295     165,925               0        No
Report

3a Re-elect Andrew Wyllie as a Director             51,315,735        490,234      17,173               0        No

3b Re-elect John M Bryant as a Director             51,318,741        483,909      20,492               0        No

3c Re-elect Saad Shehata as a Director              33,378,121        503,053   2,186,668      15,755,300        No

4 Reappoint KPMG Audit Plc as Auditors and          51,263,310        464,451      95,381               0

5 Authorise the Board to Determine the              51,244,097        463,151     115,894               0        No
Remuneration of the Auditors

6 Authorise Issue of Equity with Pre-emptive        51,096,743        574,619     151,780               0        No
Rights up to Aggregate Nominal Amount of GBP
5.935m

7 Authorise Issue of Equity without                 51,072,276        595,952     154,914               0        No
Pre-emptive Rights up to Aggregate Nominal
Amount of GBP 890
                                                                                                                 No



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