Holding(s) in Company

Cookson Group PLC
02 April 2004

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1) Name of company

COOKSON GROUP PLC

2) Name of shareholder having a major interest

BRITEL FUND TRUSTEES LIMITED

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

CHASE NOMINEES LIMITED (95,203,942 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

31 MARCH 2004

11) Date company informed

1 APRIL 2004

12) Total holding following this notification

95,203,942 SHARES (LENS INVESTORS(UK)LCC ONLY)

13) Total percentage holding of issued class following this notification

5.02% (LENS INVESTORS (UK)LCC ONLY)

14) Any additional information

Lens Investors(UK)LCC is only one of the partners of the various partnerships
managed by Hermes Focus Asset Management Limited. Hermes Focus Asset Management
Limited is in turn a subsidiary of BriTel Fund Trustees Limited. On 19 January
2004, BriTel Fund Trustees Limited notified the Company that the total material
interest of all their subsidiaries in the shares of the Company was 6.828%.


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: 2 APRIL 2004


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