Directors' Dealings

Cookson Group PLC 10 December 1999 Schedule 11 - Notification of interests of Directors and Connected Persons 1 Name of company: Cookson Group plc 2 Name of director: Gian Carlo Cozzani 3 Please state whether notification indicates that it is in respect of holding of the director named in 2 above or holding of that person's spouse or children under the age of 18 or in respect of a non- beneficial interest: as above 4 Name of registered holder(s) and, if more than one holder, the number of shares held by each of them (if notified): Gian Carlo Cozzani 5 Please state whether notification relates to a person(s) connected with the director named in 2 above and identify the connected person(s): 6 Please state the nature of the transaction. For PEP transactions please indicate whether general/single co PEP and if discretionary/non discretionary: Purchase of shares pursuant to Dividend Reinvestment 7 Number of shares/amount of stock acquired: 334 8 Percentage of issued class: less than 0.1% 9 Number of shares/amount of stock disposed: 0 10 Percentage of issued class: 0 11 Class of security: Ordinary Shares of 50 pence 12 Price per share: £2.515 13 Date of transaction: 1 December 1999 14 Date company informed: 9 December 1999 15 Total holding following this notification: 20,045 16 Total percentage holding of issued class following this notification: Less than 0.1% If a director has been granted options by the company, please complete the following fields: 17 Date of grant: 18 Period during which or date on which exercisable: 19 Total amount paid (if any) for grant of the option: 20 Description of shares or debentures involved: class, number: 21 Exercise price (if fixed at time of grant) or indication that price is to be fixed at time of exercise: 22 Total number of shares or debentures over which options held following this notification: 23 Contact name for queries: Amanda Evans 24 Contact telephone number: 0171 766 4537 25 Name of company official responsible for making notification: Amanda Evans Additional Information:

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