Holding(s) in Company

Diploma PLC
26 April 2005



     FOR IMMEDIATE RELEASE
     
     26 April 2005
     
     Dear Sirs
    
     We received a letter today from The Equity Partnership Investment Company
     PLC notifying us that following a disposal of 25,000 ordinary shares, their
     new holding is 675,000 shares, representing 2.98% of the Company's issued
     share capital.
     
    
     Yours faithfully

     NP Lingwood
     Company Secretary




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