Holding(s) in Company

Cookson Group PLC
08 August 2003

8 AUGUST 2003

COOKSON GROUP plc - NOTIFICATION OF MAJOR INTEREST IN SHARES

Cookson Group plc, 'Cookson', received notification that Legal & General Group
Plc reduced their holding of Cookson's Ordinary Shares to 2.97% following the
sale of 2,866,393 shares (0.15%) on 4 August 2003. The registered holders were
declared as follows:

HSBC Global Custody Nominees (UK) Ltd A/C 914945 - 707,166

HSBC Global Custody Nominees (UK) Ltd A/C 775245 - 8,781,892

HSBC Global Custody Nominees (UK) Ltd A/C 770286 - 478,000

HSBC Global Custody Nominees (UK) Ltd A/C 357206 - 41,356,803

HSBC Global Custody Nominees (UK) Ltd A/C 866203 - 2,580,056

HSBC Global Custody Nominees (UK) Ltd A/C 360509 - 2,280,586

HSBC Global Custody Nominees (UK) Ltd A/C 766793 - 137,851

HSBC Global Custody Nominees (UK) Ltd A/C 924422 - 44,454

Cookson subsequently received notification that Legal & General Group Plc
increased their holding of Cookson's Ordinary Shares to 3.01% following the
purchase of 612,809 shares (0.03%) on 5 August 2003. The registered holders were
declared as follows:

HSBC Global Custody Nominees (UK) Ltd A/C 914945 - 707,166

HSBC Global Custody Nominees (UK) Ltd A/C 775245 - 8,781,892

HSBC Global Custody Nominees (UK) Ltd A/C 770286 - 478,000

HSBC Global Custody Nominees (UK) Ltd A/C 357206 - 41,969,612

HSBC Global Custody Nominees (UK) Ltd A/C 866203 - 2,580,056

HSBC Global Custody Nominees (UK) Ltd A/C 360509 - 2,280,586

HSBC Global Custody Nominees (UK) Ltd A/C 766793 - 137,851

HSBC Global Custody Nominees (UK) Ltd A/C 924422 - 44,454

Rachel Fell

Assistant Company Secretary

Cookson Group plc

265 Strand

London

WC2R 1DB

Tel: [phone]

Fax: [phone]

www.cooksongroup.co.uk


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