Holding(s) in Company

Cookson Group PLC
14 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

FMR Corp. & FIDELITY INTERNATIONAL 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

NON-BENEFICIAL INTEREST

4) Name of the registered holder(s) and, if more than one holder, the
number of shares held by each of them

REGISTERED NAME                        MANAGEMENT COMPANY                                      NUMBER OF SHARES

CHASE NOMINEES LTD.                    FIDELITY INVESTMENT SERVICES LTD.                          83,082,342
CHASE MANHATTAN BANK LONDON            FIDELITY INVESTMENT SERVICES LTD.                          10,758,002
RBS TRUST BANK                         FIDELITY PENSION MANAGEMENT                                 754,695
BT GLOBENET NOMINEES LTD.              FIDELITY PENSION MANAGEMENT                                 245,180
CITIBANK                               FIDELITY PENSION MANAGEMENT                                 515,380
CHASE NOMINEES LTD.                    FIDELITY PENSION MANAGEMENT                                7,951,533
BANK OF NEW YORK LONDON                FIDELITY PENSION MANAGEMENT                                1,846,140
NORTHERN TRUST                         FIDELITY PENSION MANAGEMENT                                2,202,245

HSBC CLIENT HOLDINGS NOMINEE (UK)      FIDELITY PENSION MANAGEMENT                                 481,594
LIMITED
BANKERS TRUST                          FIDELITY INTERNATIONAL LIMITED                              292,500
RBS TRUST BANK                         FIDELITY INTERNATIONAL LIMITED                             6,982,540
CITIBANK                               FIDELITY INTERNATIONAL LIMITED                              367,120
CHASE NOMINEES LTD                     FIDELITY INTERNATIONAL LIMITED                             14,463,252
HSBC CLIENT HOLDINGS NOMINEE (UK)      FIDELITY INTERNATIONAL LIMITED                             71,165,880
LIMITED
CHASE MANHATTAN BANK LONDON            FIDELITY INTERNATIONAL LIMITED                             3,237,216
DEUTSCHE BANK                          FIDELITY INTERNATIONAL LIMITED                             1,441,330
BANK OF NEW YORK LONDON                FIDELITY INTERNATIONAL LIMITED                             9,040,686
NORTHERN TRUST                         FIDELITY INTERNATIONAL LIMITED                             3,721,613
BANK OF NEW YORK BRUSSELS              FIDELITY INTERNATIONAL LIMITED                              883,400
STATE STREET BANK & TRUST              FIDELITY INTERNATIONAL LIMITED                             2,049,340

MELLON BANK
                                       FIDELITY INTERNATIONAL LIMITED                              445,000


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

15,976,923

8) Percentage of issued class

0.84%

9) Class of security

ORDINARY SHARES OF 1 PENCE EACH

10) Date of transaction

NOT DISCLOSED

11) Date company informed

14 JUNE 2004

12) Total holding following this notification

221,926,988 SHARES

13) Total percentage holding of issued class following this notification

11.71%

14) Any additional information

15) Name of contact and telephone number for queries

RACHEL BENJAMIN, COMPANY SECRETARIAL ASSISTANT, COOKSON GROUP PLC - TEL: 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: 14 JUNE 2004


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