Notice of Trading Update

Cookson Group PLC 04 October 2006 4 October 2006 COOKSON TO PRESENT UPDATE ON STRATEGIC PLAN ON 7 NOVEMBER 2006 Cookson Group plc, the leading materials science company, announces that it plans to give a presentation to analysts and investors on Tuesday 7 November 2006 to provide an update on the execution of its strategic plan. The main presentations will be given by the three Divisional Chief Executives. The meeting will be held at Merrill Lynch Financial Centre (Old Post Office Building), 2 King Edward Street, London EC1 from 10:30am to 12:30pm. At 7:00am on 7 November, the Company will issue an announcement providing an update on trading conditions and a summary of the key points of the presentations. For further information please contact Shareholder/analyst enquiries: Cookson Group plc Isabel Luetgendorf, Investor Relations Manager Tel: +44 (0)20 7822 0000 About Cookson Group plc Cookson Group plc is a leading materials science company operating on a worldwide basis in Ceramics, Electronics and Precious Metals markets. The Ceramics division is the world leader in the supply of advanced flow control refractory products and systems to the global steel industry and a leading supplier of specialist ceramic products to the glass and foundry industries. It is also the regional leader in the US, UK and Australia in the supply and installation of monolithic refractory linings. The Electronics division is a leading supplier of advanced surface treatment and plating chemicals and assembly materials to the automotive, construction and electronics markets. The Precious Metals division is the leading supplier of fabricated precious metals (gold, silver, platinum, etc.) to the jewellery industry in the US, the UK, France and Spain. Products include alloy materials, semi-finished jewellery components and finished jewellery. This information is provided by RNS The company news service from the London Stock Exchange MSCUSVKRNVRRRRA

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