Appointment

Cookson Group PLC 26 July 2001 BOARD APPOINTMENT Cookson Group plc, the international materials technology group, is pleased to announce that Barry W. Perry, 55, will join the Board as a non-executive Director on 1 January 2002. Mr. Perry is currently Chairman and Chief Executive Officer of Engelhard Corporation ('Engelhard'). He has been on the Board of Engelhard since May 1997. Engelhard is a US based surface and materials science company that develops technologies to improve customers' products and processes. Mr. Perry previously held senior executive positions with Rhone Poulenc and with General Electric Co in the USA. Mr Perry is also a Non-executive Director of Arrow Electronics Inc. For further information, please contact: Sir Bryan Nicholson Chairman; or Stephen Howard Group Chief Executive Cookson Group plc The Adelphi 1-11 John Adam Street London WC2N 6HJ Tel: 0207 766 4500 Fax: 0207 747 6600 Notes to Editors Cookson is an international materials technology group, providing advanced materials, equipment and enabling technologies to its customers worldwide. The Group comprises three divisions - Electronics, Ceramics and Precious Metals. The mission of Cookson is to add value to its customers' businesses by providing materials, equipment, processes and services that allow them to increase the efficiency, quality and profitability of their operations. Throughout the world Cookson companies are known for supplying products that represent the best technology, supported by the best technical service. Cookson employs 18,500 people in more than 35 countries, selling its products in over 100 countries. Sales of current operations in 2000 were excess of £2.5 billion (US$3.7 billion). Cookson is headquartered in London and is listed on the London Stock Exchange. Mr Barry W. Perry was born in May 1946, educated at Dartmouth High School in Massachusetts and graduated from The University of Massachusetts, in 1968 with a degree in Plastics Engineering. He is married with three daughters and his interests include collecting antique British guns, cycling and walking.

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