Director/PDMR Shareholding

Diploma PLC
14 December 2007



                                         12 CHARTERHOUSE SQUARE, LONDON EC1M 6AX
                                                  TELEPHONE: [phone]
                                                  FACSIMILE: [phone]

    FOR IMMEDIATE RELEASE

                                                                14 December 2007


                  DIPLOMA PLC - DIRECTORS' INTERESTS IN SHARES

    Diploma PLC, the international group of specialised distribution businesses,
    has been notified that Mr JL Rennocks, the Chairman of the Company, has
    acquired a further 3,000 ordinary shares of the Company, following a
    purchase of shares today at 855 pence per share.


    For further enquiries please contact:

    Nigel Lingwood, Group Finance Director 020 7549 5705




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