Director/PDMR Shareholding

Cookson Group PLC
07 April 2008

7 April 2008



Directors' Interest
Cookson Group plc



In accordance with the rules of the Cookson Group Long-Term Incentive Plan (the
'Plan') the allocations of 116,603 Performance Shares and 57,964 Matching Shares
awarded to Nick Salmon, Chief Executive on 4 April 2005 vested on 4 April 2008.


The shares to satisfy the vesting of these awards were sourced from Cookson's
Employee Share Ownership Trust.  The Trustees arranged for 71,573 shares to be
sold to meet Mr Salmon's associated tax liability.  As a result 71,573 shares
were sold on Friday 4 April at 676 p.  The remaining 102,994 shares have been
transferred into his own name.


As a result of the above vesting, the revised interests of Mr Salmon in the
shares of the Company are as follows:-


            Total outstanding allocation   Total outstanding allocation of
            of Performance Shares under       Matching Shares under the
            the Long-Term Incentive Plan      Long-Term Incentive Plan       Current Shareholding

                                                                                        
N R Salmon            245,622                          449,965                     240,729



Please note that the allocation of 40,636 Performance Shares made to Mr
Butterworth in 2005 is expected to vest on the third anniversary of the award
date, 2 August 2008.



Cookson Group plc
165 Fleet Street
London EC4A 2AE
Tel: [phone]
Fax: [phone]
Web: www.cooksongroup.co.uk






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