Director/PDMR Shareholding

Diploma PLC
29 March 2007



    FOR IMMEDIATE RELEASE

                                                                 29 March 2007

                                  DIPLOMA PLC
                                        
    NOTIFICATION OF TRANSACTION OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL
                  RESPONSIBILITY ('PDMR') OR CONNECTED PERSON


The Company has been notified that today Iain Henderson, an Executive Director
of the Company, has sold 15,000 Ordinary Shares at £8.54 per share and his SIPP,
which is held by TD Waterhouse, has purchased 15,000 Ordinary Shares at £8.54.
His beneficial interest in the shares of the Company remains unchanged at 61,000
ordinary shares.
                                        

    For further enquiries please contact:

    Nigel Lingwood, Group Finance Director     020 7448 4875



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