Holding(s) in Company

Cookson Group PLC
07 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

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 LIMITED                 FIDELITY MANAGEMENT & RESEARCH COMPANY                      500,000

STATE STREET NOMINEES LTD.             FIDELITY MANAGEMENT TRUST COMPANY                           150,000

BROWN BROTHERS HARRIMAN                FIDELITY MANAGEMENT TRUST COMPANY                           110,800

STATE STREET BANK & TRUST              FIDELITY MANAGEMENT TRUST COMPANY                            72,100

CHASE NOMINEES LTD.                    FIDELITY INVESTMENT SERVICES LTD.                        84,399,682

CHASE MANHATTAN BANK LONDON            FIDELITY INVESTMENT SERVICES LTD.                        10,758,002

RBS TRUST BANK                         FIDELITY PENSION MANAGEMENT                                 754,695

NORTRUST NOMINEES LTD.                 FIDELITY PENSION MANAGEMENT                               1,250,460

BT GLOBENET NOMINEES LTD.              FIDELITY PENSION MANAGEMENT                                 245,180

CITIBANK                               FIDELITY PENSION MANAGEMENT                                 515,380

CHASE NOMINEES LTD.                    FIDELITY PENSION MANAGEMENT                               8,795,501

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                               1,666,300
LIMITED

BANKERS TRUST                          FIDELITY INTERNATIONAL LIMITED                              292,500

RBS TRUST BANK                         FIDELITY INTERNATIONAL LIMITED                            6,914,240

CITIBANK                               FIDELITY INTERNATIONAL LIMITED                              367,120

CHASE NOMINEES LTD                     FIDELITY INTERNATIONAL LIMITED                           15,206,852

HSBC CLIENT HOLDINGS NOMINEE (UK)      FIDELITY INTERNATIONAL LIMITED                           73,572,409
LIMITED

CHASE MANHATTAN BANK LONDON            FIDELITY INTERNATIONAL LIMITED                            7,036,406

DEUTSCHE BANK                          FIDELITY INTERNATIONAL LIMITED                            3,506,130

BANK OF NEW YORK LONDON                FIDELITY INTERNATIONAL LIMITED                            9,390,686

NORTHERN TRUST                         FIDELITY INTERNATIONAL LIMITED                            2,893,420

BANK OF NEW YORK BRUSSELS              FIDELITY INTERNATIONAL LIMITED                              890,300

STATE STREET BANK & TRUST              FIDELITY INTERNATIONAL LIMITED                            4,219,663

JP MORGAN                              FIDELITY INTERNATIONAL LIMITED                              347,700
                                       

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

9,165,730

8) Percentage of issued class

0.484%

9) Class of security

ORDINARY SHARES OF 1 PENCE EACH

10) Date of transaction

6 APRIL 2004

11) Date company informed

6 APRIL 2004

12) Total holding following this notification

237,903,911 SHARES

13) Total percentage holding of issued class following this notification

12.555%

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: 7 APRIL 2004


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