Holding(s) in Company

Cookson Group PLC
27 November 2006

                                  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

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 10 PENCE EACH

10) Date of transaction

22 NOVEMBER 2006

11) Date company informed

27 NOVEMBER 2006

12) Total holding following this notification

NOT DISCLOSED

13) Total percentage holding of issued class following this notification

NOT DISCLOSED

14) Any additional information
BARCLAYS PLC NO LONGER HAS A NOTIFIABLE INTEREST IN THE CAPITAL OF COOKSON GROUP
PLC

15) Name of contact and telephone number for queries

SILVANA GLIBOTA-VIGO, COMPANY SECRETARIAL ASSISTANT, COOKSON GROUP PLC - 020
7822 0065

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

SILVANA GLIBOTA-VIGO, COMPANY SECRETARIAL ASSISTANT, COOKSON GROUP PLC

Date of notification: 27 NOVEMBER 2006


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