Holding(s) in Company

Cookson Group PLC
17 November 2003

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1) Name of company

COOKSON GROUP PLC

2) Name of shareholder having a major interest

FIDELITY MANAGEMENT TRUST COMPANY & 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
STATE STREET NOMINEES LTD.             FIDELITY MANAGEMENT TRUST COMPANY                           150,000
BROWN BROTHERS HARRIMAN                FIDELITY MANAGEMENT TRUST COMPANY                            96,400
STATE STREET BANK & TRUST              FIDELITY MANAGEMENT TRUST COMPANY                            72,100
CHASE NOMINEES LTD.                    FIDELITY INVESTMENT SERVICES LTD.                          77,706,642
CHASE MANHATTAN BANK LONDON            FIDELITY INVESTMENT SERVICES LTD.                          18,823,902
RBS TRUST BANK                         FIDELITY PENSION MANAGEMENT                                 754,695
NORTRUST NOMINEES LTD.                 FIDELITY PENSION MANAGEMENT                                 788,060
BT GLOBENET NOMINEES LTD.              FIDELITY PENSION MANAGEMENT                                 269,880
CITIBANK                               FIDELITY PENSION MANAGEMENT                                 476,580
CHASE NOMINEES LTD.                    FIDELITY PENSION MANAGEMENT                                11,528,101
BANK OF NEW YORK LONDON                FIDELITY PENSION MANAGEMENT                                1,967,340
NORTHERN TRUST                         FIDELITY PENSION MANAGEMENT                                2,783,240
BANKERS TRUST                          FIDELITY INTERNATIONAL LIMITED                              511,420
RBS TRUST BANK                         FIDELITY INTERNATIONAL LIMITED                             7,820,740
CITIBANK                               FIDELITY INTERNATIONAL LIMITED                              367,120
CHASE NOMINEES LTD                     FIDELITY INTERNATIONAL LIMITED                             18,252,952
HSBC CLIENT HOLDINGS NOMINEE (UK)      FIDELITY INTERNATIONAL LIMITED                             82,840,230
LIMITED
CHASE MANHATTAN BANK LONDON            FIDELITY INTERNATIONAL LIMITED                             7,076,870
DEUTSCHE BANK                          FIDELITY INTERNATIONAL LIMITED                             5,382,990
BANK OF NEW YORK LONDON                FIDELITY INTERNATIONAL LIMITED                             12,985,058
NORTHERN TRUST                         FIDELITY INTERNATIONAL LIMITED                             4,482,080
MELLON TRUST                           FIDELITY INTERNATIONAL LIMITED                              330,760
BANK OF NEW YORK BRUSSELS              FIDELITY INTERNATIONAL LIMITED                             2,002,689
STATE STREET BANK & TRUST              FIDELITY INTERNATIONAL LIMITED                             5,337,976



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

20,032,495

8) Percentage of issued class

1.06%

9) Class of security

ORDINARY SHARES OF 1 PENCE EACH

10) Date of transaction

13 NOVEMBER 2003

11) Date company informed

17 NOVEMBER 2003

12) Total holding following this notification

262,807,825 SHARES

13) Total percentage holding of issued class following this notification

13.89%

14) Any additional information

NONE


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: 17 NOVEMBER 2003


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