Holding(s) in Company

Cookson Group PLC
12 August 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 GLOBAL INVESTORS LIMITED (59,264,841 SHARES)

BARCLAYS GLOBAL INVESTORS JAPAN LIMITED (385,296 SHARES)

BARCLAYS GLOBAL INVESTORS JAPAN TRUST & BANKING (1,912,529 SHARES)

BARCLAYS GLOBAL INVESTORS, N.A. (27,731,406 SHARES)

BARCLAYS GLOBAL FUND ADVISORS (742,924 SHARES)

BARCLAYS GLOBAL INVESTORS AUSTRALIA LIMITED (1,022,446 SHARES)

BARCLAYS LIFE ASSURANCE CO LIMITED (2,611,570 SHARES)

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

GERRARD LIMITED (320,803 SHARES)


5) Number of shares/amount of stock acquired

N/A

6) Percentage of issued class

N/A

7) Number of shares/amount of stock disposed

NOT DISCLOSED

8) Percentage of issued class

NOT DISCLOSED

9) Class of security

ORDINARY SHARES OF 1 PENCE EACH

10) Date of transaction


6 AUGUST 2004

11) Date company informed

11 AUGUST 2004

12) Total holding following this notification

94,007,415 SHARES

13) Total percentage holding of issued class following this notification

4.96%

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: 12 AUGUST 2004




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