Holding in Company

Cookson Group PLC
20 December 2001

                                 SCHEDULE 10

                  NOTIFICATION OF MAJOR INTERESTS IN SHARES

1) Name of company

COOKSON GROUP PLC

2) Name of shareholder having a major interest

MORLEY FUND MANAGEMENT LIMITED (A subsidiary of CGNU PLC) AND CGNU 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

AS 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 - 19,438,073 SHARES

CHASE GA GROUP NOMINEES LTD - 25,049,323 SHARES

CUIM NOMINEE LIMITED - 19,706,690 SHARES

RBSTB NOMINEES LIMITED - 1,589,478 SHARES


5) Number of shares/amount of stock acquired

305,533 SHARES

6) Percentage of issued class

0.04%

7) Number of shares/amount of stock disposed

N/A

8) Percentage of issued class

N/A

9) Class of security

ORDINARY SHARES OF 50 PENCE EACH

10) Date of transaction

17 DECEMBER 2001

11) Date company informed

19 DECEMBER 2001

12) Total holding following this notification

65,783,564 SHARES

13) Total percentage holding of issued class following this notification

9.04%

14) Any additional information


15) Name of contact and telephone number for queries

RACHEL FELL, COMPANY SECRETARIAL EXECUTIVE, COOKSON GROUP PLC - TEL: [phone]
4536

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

RACHEL FELL, COMPANY SECRETARIAL EXECUTIVE, COOKSON GROUP PLC


Date of notification: 20 DECEMBER 2001