Share notification

Costain Group PLC
08 April 2004

Costain Group PLC





                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES



1. Name of company



Costain Group PLC



2. Name of shareholder having a major interest



Lloyds TSB Bank PLC and Lloyds TSB Group PLC



3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18



Notification  indicates that it is in respect of holding of the Shareholder in 2
above



4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them



Euroclear Nominees Limited 10,648,000 ordinary shares

Ranelagh Nominees Limited 7,999,990 ordinary shares (the subject of this
notification)



5. Number of shares / amount of stock acquired



7,999,990



6. Percentage of issued class



2.26%



7. Number of shares / amount of stock disposed



N/A



8. Percentage of issued class



N/A



9. Class of security



Ordinary shares



10. Date of transaction



Ordinary shares allotted on 29 March 2004. Admitted to listing 2 April 2004



11. Date company informed



7 April 2004



12. Total holding following this notification



18,647,990 ordinary



13. Total percentage holding of issued class following this notification



5.28%



14. Any additional information



none



15. Name of contact and telephone number for queries



Clive L Franks - 01628 842 575



16. Name and signature of authorised company official responsible for making
this notification



Clive L Franks, Company Secretary



Date of notification



8 April 2004



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