Director/PDMR Shareholding

Diploma PLC
27 November 2007



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


    FOR IMMEDIATE RELEASE

                                                               27 November 2007

                  DIPLOMA PLC - DIRECTORS' INTERESTS IN SHARES

    Diploma PLC, the international group of specialised distribution businesses,
    has been notified today that Mr J Rennocks, the Chairman of the Company, has
    acquired a further 2,000 ordinary shares of the Company, following a
    purchase of shares yesterday, at 907 pence per share.


    For further enquiries please contact:

    Nigel Lingwood, Group Finance Director     020 7549 5705




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