Celltech Group PLC
20 May 2004

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of company

Celltech Group plc

2. Name of shareholder having a major interest

Goldman Sachs Group

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

As 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

Goldman Sachs Securities (Nominees) Limited                  7,001,435
Goldman Sachs Securities (Nominees) Limited                     68,930
Depositary Trust Company of New York                            19,664
Crest account Creptemp                                       6,219,407

5. Number of shares / amount of stock acquired

2,299,568 (since last notification)

6. Percentage of issued class

0.82%

7. Number of shares / amount of stock disposed

N/a

8. Percentage of issued class

N/a

9. Class of security

Ordinary 50p shares

10. Date of transaction

Close of business on 18 May 2004

11. Date company informed

20 May, 2004

12. Total holding following this notification
                                                            
13,309,436

13. Total percentage holding of issued class following this notification
                                                                  
4.78%

14. Any additional information

15. Name of contact and telephone number for queries

Cheryl Cramer Tel. 01753 447933

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

J A D Slater

Date of notification

20 May, 2004