Holding(s) in Company

Diploma PLC
25 June 2007



Letter to Diploma Plc
Dated 22nd June, 2007


We refer to sections 198-202 of the Companies Act 1985.

Slater Investments now holds a total number of shares of 810,201 on behalf of
clients that it advises and manages. Based on 22,685,733 shares being in issue,
this represents 3.57% of the issued ordinary share capital.



From Slater Investments Limited




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