Termination of ADR Programme

Cookson Group PLC
19 September 2005

                               Cookson Group plc

            Termination of ADR programme and US SEC De-Registration

                               19 September 2005

Further to its announcement on 26 July 2005, Cookson Group plc ('Cookson' or the
'Company') confirms that it is continuing to examine the steps required to
de-register from the US Securities and Exchange Commission which will allow the
Company to benefit from significant administrative and audit cost-savings.  In
that connection, the Company has elected to terminate its American Depository
Receipt ('ADR') programme effective as of close of trading on 19 October 2005.
Cookson expects its ADRs to cease being quoted on the Over-the-Counter Bulletin
Board around the same time as a result of this termination.

Cookson's ordinary shares will continue to be listed on the UK Listing
Authority's Official List and to be traded on the London Stock Exchange's market
for listed securities.

Further announcements will be released in due course by the Company.


Enquiries:
Richard Malthouse, Group Secretary                     Tel: + 44 (0)20 7061 6500
Cookson Group plc


About Cookson Group plc

Cookson Group plc is a leading materials science company which provides
materials, processes and services to customers worldwide. The Group's operations
are formed into three divisions - Ceramics, Electronics and Precious Metals. The
Ceramics division is the world leader in the supply of advanced flow control and
refractory products and systems to the iron and steel industry and is also a
leading supplier of refractory lining materials for iron and steelmaking and
other industrial processes. The Electronics division is a leading manufacturer
and supplier of materials and services to the electronics industry, primarily
serving fabricators and assemblers of printed circuit boards, assemblers of
semiconductor packaging and the electrical and industrial markets. The Precious
Metals division is a leading supplier to the jewellery industry of fabricated
precious metals products.

Headquartered in London, Cookson employs some 16,000 people in more than 35
countries and sells its products in over 100 countries


Cookson Group plc, 265 Strand, London WC2R 1DB
Tel: [phone] Fax: [phone]
www.cooksongroup.co.uk



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