Holding(s) in Company

Diploma PLC
25 November 2004


                                  DIPLOMA PLC
                                 20 Bunhill Row
                                London, EC1Y 8UD
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     FOR IMMEDIATE RELEASE
     

     Dear Sirs

     We received a letter on Wednesday, 24 November 2004 from The Equity
     Partnership Investment Company PLC notifying a purchase of 25,000 Diploma
     PLC ordinary shares taking their total shareholding to 700,000 representing
     3.09% of the issued share capital.

     Yours faithfully

     NP Lingwood

     Company Secretary

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