Holding(s) in Company

Cookson Group PLC
30 December 2002

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1) Name of company

COOKSON GROUP PLC

2) Name of shareholder having a major interest

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                                      82,200

CHASE NOMINEES LTD.                    FIDELITY INVESTMENT SERVICES LTD.                                  80,068,201

CHASE MANHATTAN BANK LONDON            FIDELITY INVESTMENT SERVICES LTD.                                  19,547,502

RBS TRUST BANK                         FIDELITY PENSION MANAGEMENT                                         3,382,795

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                                        11,626,601

BANK OF NEW YORK LONDON                FIDELITY PENSION MANAGEMENT                                         2,045,940

NORTHERN TRUST                         FIDELITY PENSION MANAGEMENT                                         2,783,240

HSBC                                   FIDELITY PENSION MANAGEMENT                                           847,780

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                                     17,471,750

HSBC CLIENT HOLDINGS NOMINEE (UK)      FIDELITY INTERNATIONAL LIMITED                                     92,637,427
LIMITED

CHASE MANHATTAN BANK LONDON            FIDELITY INTERNATIONAL LIMITED                                      2,570,820

DEUTSCHE BANK                          FIDELITY INTERNATIONAL LIMITED                                      4,777,280

BANK OF NEW YORK LONDON                FIDELITY INTERNATIONAL LIMITED                                     21,922,798

NORTHERN TRUST                         FIDELITY INTERNATIONAL LIMITED                                      7,242,760

MELLON TRUST                           FIDELITY INTERNATIONAL LIMITED                                        620,360

BANK OF NEW YORK BRUSSELS              FIDELITY INTERNATIONAL LIMITED                                      2,361,189

STATE STREET BANK & TRUST              FIDELITY INTERNATIONAL LIMITED                                      2,467,877


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

23 DECEMBER 2002

11) Date company informed

27 DECEMBER 2002

12) Total holding following this notification

282,840,320 SHARES

13) Total percentage holding of issued class following this notification

14.95%

14) Any additional information

NONE


15) Name of contact and telephone number for queries

ALAN WALLWORK, ASST COMPANY SECRETARY, COOKSON GROUP PLC - TEL: [phone]


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

ALAN WALLWORK, ASST COMPANY SECRETARY, COOKSON GROUP PLC


Date of notification: 30 DECEMBER 2002


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