Holding(s) in Company

Cookson Group PLC
03 June 2004

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1) Name of company

COOKSON GROUP PLC

2) Name of shareholder having a major interest

BARCLAYS 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


BARCLAYS PRIVATE BANK AND TRUST LIMITED (15,600 SHARES)

BARCLAYS GLOBAL INVESTORS LIMITED (59,650,722 SHARES)

BARCLAYS GLOBAL INVESTORS N.A. (24,431,662 SHARES)

BARCLAYS GLOBAL FUND ADVISORS (618,457 SHARES)

BARCLAYS GLOBAL INVESTORS AUSTRALIA LIMITED (840,400 SHARES)

GERRARD LIMITED (335,910 SHARES)

BARCLAYS LIFE ASSURANCE CO LIMITED (2,639,740) SHARES


5) Number of shares/amount of stock acquired

NOT DISCLOSED

6) Percentage of issued class

NOT DISCLOSED

7) Number of shares/amount of stock disposed

N/A


8) Percentage of issued class

N/A


9) Class of security

ORDINARY SHARES OF 1 PENCE EACH

10) Date of transaction

28 MAY 2004

11) Date company informed

3 JUNE 2004

12) Total holding following this notification

88,532,491 SHARES

13) Total percentage holding of issued class following this notification

4.67%

14) Any additional information


15) Name of contact and telephone number for queries

RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC - 020 7061 6562

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


RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC


Date of notification: 3 JUNE 2004


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