Director/PDMR Shareholding

Diploma PLC
30 November 2006


                                                                  NEWSRELEASE 
            DIPLOMAPLC
            
            FOR IMMEDIATE RELEASE

                                                              30 November 2006

                  DIPLOMA PLC - DIRECTORS' INTERESTS IN SHARES

            Diploma PLC, the international group of specialised distribution
            businesses, has today been notified that the following Directors
            have both received ordinary shares in the Company and have disposed
            of ordinary shares in the Company, as set out below:


                                   No. of Ordinary Shares
                           Received         Sold           Net           Market 
                                                           Retained      Price

            BM Thompson     45,431        18,627           26,804       £7.855p

            I Henderson     26,724        12,894           13,830       £7.855p

            NP Lingwood     27,615        15,994           11,621       £7.855p


            The shares were received pursuant to the vesting of an award of
            shares made on 7 January 2004 under the Company's Long Term
            Incentive Plan ('LTIP'). The vesting of the award was subject to
            performance conditions as set out in the LTIP and measured over a
            three year period ended 30 September 2006. Further details relating
            to the performance conditions will be set out in the Annual Report
            2006, which will be posted to shareholders on 6 December 2006.

            The shares were transferred to the Directors by Ogier Employee
            Benefit Trustee Limited, as trustee of the Diploma Employee Benefit
            Trust ('the Trust'). At the same time, Ogier Employee Benefit
            Trustee Limited, on behalf of the Trust, acquired the 47,515
            ordinary shares in the Company sold by the Directors at a market
            price of £7.855p. Accordingly the number of ordinary shares in the
            Company held by the Trust has, following this transfer and purchase,
            been reduced by 52,255 to 102,587.

            Each of the Executive Directors of the Company, BM Thompson, I
            Henderson, 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:

            Bruce Thompson, Chief Executive Officer     020 7638 0934
            Nigel Lingwood, Group Finance Director      020 7448 4875




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