Holding in Company

Cookson Group PLC
19 July 2001

                                 SCHEDULE 10

                  NOTIFICATION OF MAJOR INTERESTS IN SHARES

1) Name of company

COOKSON GROUP PLC

2) Name of shareholder having a major interest

PUTNAM INVESTMENT MANAGEMENT, LLC AND THE PUTNAM ADVISORY COMPANY, LLC

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

NON-BENEFICIAL INTEREST

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

NOT DISCLOSED


5) Number of shares/amount of stock acquired

22,298,990 SHARES

6) Percentage of issued class

3.06%

7) Number of shares/amount of stock disposed

N/A

8) Percentage of issued class

N/A

9) Class of security

ORDINARY SHARES OF 25 PENCE EACH

10) Date of transaction

NOT DISCLOSED

11) Date company informed

19 JULY 2001

12) Total holding following this notification

22,298,990 SHARES

13) Total percentage holding of issued class following this notification

3.06%

14) Any additional information


15) Name of contact and telephone number for queries

BEN MATHEWS, DEPUTY SECRETARY, COOKSON GROUP PLC - TEL: [phone]

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

BEN MATHEWS, DEPUTY SECRETARY, COOKSON GROUP PLC


Date of notification: 19 JULY 2001