Holding(s) in Company

Cookson Group PLC
08 November 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 MANHATTAN BANK LONDON            FIDELITY INVESTMENT SERVICES LTD.                          87,058,862

JP MORGAN                              FIDELITY INVESTMENT SERVICES LTD.                          3,995,782

STATE STREET NOMINEES LTD.             FIDELITY MANAGEMENT TRUST COMPANY                           200,200

BT GLOBENET NOMINEES LTD.              FIDELITY MANAGEMENT TRUST COMPANY                           245,180

CITIBANK                               FIDELITY MANAGEMENT TRUST COMPANY                           515,380

BANK OF NEW YORK LONDON                FIDELITY MANAGEMENT TRUST COMPANY                          1,733,340

NORTHERN TRUST                         FIDELITY MANAGEMENT TRUST COMPANY                          2,202,245

BROWN BROTHERS HARRIMAN                FIDELITY MANAGEMENT TRUST COMPANY                           198,900

STATE STREET BANK & TRUST              FIDELITY MANAGEMENT TRUST COMPANY                           146,600

CHASE MANHATTAN BANK LONDON            FIDELITY MANAGEMENT TRUST COMPANY                          7,519,801

RBS TRUST BANK                         FIDELITY MANAGEMENT TRUST COMPANY                           754,695

BANKERS TRUST                          FIDELITY INTERNATIONAL LIMITED                              292,500

RBS TRUST BANK                         FIDELITY INTERNATIONAL LIMITED                             3,500,820

CITIBANK                               FIDELITY INTERNATIONAL LIMITED                              367,120

CHASE MANHATTAN BANK LONDON            FIDELITY INTERNATIONAL LIMITED                             19,022,162

DEUTSCHE BANK                          FIDELITY INTERNATIONAL LIMITED                             1,441,330

BANK OF NEW YORK LONDON                FIDELITY INTERNATIONAL LIMITED                             10,497,306

NORTHERN TRUST                         FIDELITY INTERNATIONAL LIMITED                             7,619,580

STATE STREET BANK & TRUST CO           FIDELITY INTERNATIONAL LIMITED                              543,890

STATE STREET BANK & TRUST              FIDELITY INTERNATIONAL LIMITED                              692,600

MELLON BANK                            FIDELITY INTERNATIONAL LIMITED                             1,430,800

JP MORGAN                              FIDELITY INTERNATIONAL LIMITED                             3,921,680

HSBC                                   FIDELITY INTERNATIONAL LIMITED                             71,165,880

JP MORGAN CHASE                        FMR CORP                                                     30,000



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

2,362,252

8) Percentage of issued class

0.125%

9) Class of security

ORDINARY SHARES OF 1 PENCE EACH

10) Date of transaction

NOT DISCLOSED

11) Date company informed

8 NOVEMBER 2004

12) Total holding following this notification

225,096,653 SHARES

13) Total percentage holding of issued class following this notification

11.881%

14) Any additional information

15) Name of contact and telephone number for queries

RACHEL BENJAMIN, COMPANY SECRETARIAL ASSISTANT, COOKSON GROUP PLC - 
TEL: [phone]


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

RACHEL BENJAMIN, COMPANY SECRETARIAL ASSISTANT, COOKSON GROUP PLC



Date of notification: 8 NOVEMBER 2004


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