SEC Deregistration

Cookson Group PLC
10 July 2007




10 July 2007

                 Cookson Group plc ('Cookson' or the 'Company')
                          Permanent SEC Deregistration


The US Securities & Exchange Commission ('SEC') recently approved new rules to
allow non-US companies that have previously deregistered and suspended their SEC
reporting obligations to permanently terminate any ongoing obligations. Cookson
Group plc today announces that it intends to permanently deregister and
terminate its reporting obligations under the US Securities Exchange Act of
1934, as amended, by filing a Form 15F with the SEC by the end of July 2007.

Cookson originally filed a Form 15 with the SEC to terminate the SEC
registration of its ordinary shares on 21 February 2006. SEC deregistration
occurred 90 days after this date. Under the then applicable SEC regulations,
Cookson retained an ongoing obligation to ensure that the number of its
US-resident shareholders remained below 300 at each fiscal year-end to avoid
re-commencement of its SEC reporting and other applicable US obligations.

The new SEC rules allow Cookson to file for permanent deregistration and
dispense with the constraints of the existing ongoing obligations.



Enquiries:

Cookson Group plc                          Tel: [phone]
Richard Malthouse, Group Secretary         www.cooksongroup.co.uk




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