Holding(s) in Company

Celltech Group PLC
18 March 2003

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of company
Celltech Group plc

2. Name of shareholder having a major interest
Aviva plc and Morley Fund Management Limited

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
BNY Norwich Union Nominees Ltd          2,509,236
BT Globenet Nominees Ltd                    5,500
Chase GA Group Nominees Ltd             5,140,759
Chase Nominees Ltd                        698,777
CUIM Nominee Ltd                        2,925,612
RBSTB Nominees Ltd                        297,074

5. Number of shares / amount of stock acquired
580,298

6. Percentage of issued class
0.21%

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
14 March 2003

11. Date company informed
18 March 2003

12. Total holding following this notification
11,576,958

13. Total percentage holding of issued class following this notification
4.2%

14. Any additional information

15. Name of contact and telephone number for queries
Anita Dowling
[phone]

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

Date of notification
18 March 2003

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                      This information is provided by RNS
            The company news service from the London Stock Exchange END

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