Holding(s) in Company

Cookson Group PLC 17 May 2002 SCHEDULE 10 NOTIFICATION OF MAJOR INTERESTS IN SHARES 1) Name of company COOKSON GROUP PLC 2) Name of shareholder having a major interest LEGAL & GENERAL INVESTMENT MANAGEMENT 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 AS ABOVE 4) Name of the registered holder(s) and, if more than one holder, the number of shares held by each of them HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 886603 - 3,000,000 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 775245 - 3,333,674 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 360509 - 600,675 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 357206 - 15,020,993 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 866197 - 41,352 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 130007 - 400,000 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 904332 - 56,100 5) Number of shares/amount of stock acquired 2,000,000 6) Percentage of issued class 0.28% 7) Number of shares/amount of stock disposed N/A 8) Percentage of issued class N/A 9) Class of security ORDINARY SHARES OF 50 PENCE EACH 10) Date of transaction 15 MAY 2002 11) Date company informed 17 MAY 2002 12) Total holding following this notification 22,452,794 SHARES 13) Total percentage holding of issued class following this notification 3.09% 14) Any additional information N/A 15) Name of contact and telephone number for queries ALAN WALLWORK, ASST COMPANY SECRETARY, COOKSON GROUP PLC - TEL: 020 7766 4537 16) Name and signature of authorised company official responsible for making this notification ALAN WALLWORK, ASST COMPANY SECRETARY, COOKSON GROUP PLC Date of notification: 17 MAY 2002 This information is provided by RNS The company news service from the London Stock Exchange HOLGUUCWAUPPGGM

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