Director/PDMR Shareholding

Diploma PLC
20 December 2007



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

   FOR IMMEDIATE RELEASE

                                                               20 December 2007

   DIPLOMA PLC

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

   Diploma PLC, the international group of specialised distribution businesses,
   has been informed that Ogier Employee Benefit Trustee Limited, as trustee of
   the Diploma Employee Benefit Trust, has today purchased 42,000 ordinary
   shares in the Company at a price of £8.52.

   Each of the Executive Directors of the Company, BM Thompson, I Henderson and
   NP Lingwood, is deemed to be beneficially interested in all the shares held
   in the Trust from time to time by virtue of being a potential beneficiary
   under the Trust.


   For further enquiries please contact:

   Nigel Lingwood, Group Finance Director 020 7549 5705




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