Holding(s) in Company

Cookson Group PLC
07 February 2005

                                  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 LTD (46,849,920 SHARES)

BARCLAYS LIFE ASSURANCE CO LTD (2,557,991 SHARES)

BARCLAYS GLOBAL INVESTORS, N.A. (17,507,433 SHARES)

BARCLAYS GLOBAL INVESTORS JAPAN TRUST & BANKING (1,889,018 SHARES)

BARCLAYS GLOBAL FUND ADVISORS (4,414,908 SHARES)

GERRARD LTD (279,071 SHARES)

BARCLAYS CAPITAL SECURITIES LTD (300,000 SHARES)

BARCLAYS GLOBAL INVESTORS AUSTRALIA LTD (307,759 SHARES)

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

BARCLAYS GLOBAL INVESTORS JAPAN LTD (443,401 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

2 FEBRUARY 2005

11) Date company informed

7 FEBRUARY 2005

12) Total holding following this notification

74,565,101 SHARES

13) Total percentage holding of issued class following this notification

3.93%

14) Any additional information


15) Name of contact and telephone number for queries

RACHEL BENJAMIN, COMPANY SECRETARIAL ASSISTANT, COOKSON GROUP PLC - 020 7061
6565

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


RACHEL BENJAMIN, COMPANY SECRETARIAL ASSISTANT, COOKSON GROUP PLC

Date of notification: 7 FEBRUARY 2005


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