Holding in Company

Cookson Group PLC 15 October 2001 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 775180 - 400,000 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 775245 - 3,333,674 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 361602 - 90,000 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 754612 - 500,000 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 252605 - 284,200 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 360509 - 428,375 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 770286 - 750,000 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 357206 - 15,903,997 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 866197 - 41,352 HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 130007 - 250,000 5) Number of shares/amount of stock acquired 417,000 SHARES 6) Percentage of issued class 0.06% 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 11 OCTOBER 2001 11) Date company informed 15 OCTOBER 2001 12) Total holding following this notification 21,981,598 SHARES 13) Total percentage holding of issued class following this notification 3.02% 14) Any additional information N/A 15) Name of contact and telephone number for queries BEN MATHEWS, DEPUTY SECRETARY, COOKSON GROUP PLC - TEL: 020 7766 4537 16) Name and signature of authorised company official responsible for making this notification BEN MATHEWS, DEPUTY SECRETARY, COOKSON GROUP PLC Date of notification 15 OCTOBER 2001

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