Director/PDMR Shareholding

Cookson Group PLC
01 April 2008


1 April 2008



Directors' Interests
Cookson Group plc


In accordance with the rules of the Cookson Group Long-Term Incentive Plan (the
'Plan') the executive Directors of Cookson Group plc have received their annual
allocations of Performance Shares.  In addition, Nick Salmon, Chief Executive,
and Mike Butterworth, Group Finance Director, have both chosen to invest in
Cookson shares and as a result have received allocations of Matching Shares.


Performance Shares were allocated to executive Directors on 31 March 2008, based
upon the mid-market closing price for shares in Cookson Group plc ('the 
Company') on 28 March 2008, of 643 pence.  The allocations are as follows:


Director                                    Performance Shares
N R Salmon                                      80,342
M G Butterworth                                 48,755



In accordance with the rules of the Plan, the executive Directors are eligible
to invest all or part of their Annual Incentive payment in shares in the Company
in return for which they would be granted an award of shares ('Matching Shares
').  In this regard Mr Salmon purchased 43,958 shares and Mr Butterworth
purchased 28,293 shares.  Details of these purchases were announced on 12 March
2008.  As a result of these investments in Company shares, Messrs Salmon and
Butterworth were yesterday allocated 154,942 and 99,727 Matching Shares
respectively.



Awards of Performance and Matching Shares under the Plan will normally vest on
or shortly after the third anniversary of the award date.  The proportion of an
award that vests will be subject to the attainment of certain performance
conditions relating to the performance of the Company over the three financial
years to which the award relates, as detailed in the Annual Report.



As a result of the above, the revised interests of the executive Directors in
the shares of the Company are as follows:-


Director                                                                                                   Total        
                Existing Performance Existing Matching  2008 allocation   2008 allocation       Total     Allocation
                  Shares allocated   Shares allocated   of Performance     of Matching     Allocation of    of Matching
                under the Long-Term      under the     Shares under the Shares under the    Performance        Shares
                   Incentive Plan        Long-Term        Long-Term         Long-Term         Shares
                                      Incentive Plan    Incentive Plan   Incentive Plan

N R Salmon            281,883             352,987           80,342           154,942         362,225*         507,929*
M G Butterworth       132,925             107,812           48,755           99,727          181,680*         207,539*



Note:

* The performance period for the Plan awards made in 2005 ended on 31 December
2007.  The Company achieved the requisite performance during this period and as
a result these awards will vest in full on the third anniversary of the award
date.  116,603 Performance Shares and 57,964 Matching Shares are therefore
expected to vest to Mr Salmon on 4 April 2008, and 40,636 Performance Shares to
Mr Butterworth on 2 August 2008.


Director                                    Current Shareholdings
N R Salmon                                         137,735
M G Butterworth                                     65,015





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





                      This information is provided by RNS
            The company news service from the London Stock Exchange