Holding(s) in Company

Diploma PLC
20 May 2004

To: Diploma PLC
Dated 19th May 2004

Re: S.198 Companies Act 1985: as amended by The Disclosure of Interest in Shares 
(Amendment) Regulations 1993


In accordance with the Companies Act 1985, (as amended) I write to notify you 
that UBS Global Asset Management Life Ltd has an interest in 744,163 ord 5p 
shares of the Company. This represents 3.28% of the issued share capital of the 
Company.


Please find below a list of the Registered holders.

UBS Global Asset Management Life Ltd is a subsidiary of UBS Global Asset
Management Holding (No.2) Ltd which is also treated as having an interest in
the above shares. We are authorised to make this aggregate disclosure on behalf
of UBS Global Asset Management Holding (No-2) Ltd the registered address of
which is:

     21 Lombard Street 
     London 
     EC3V 9AH

 
                             Diploma PLC

             Total Issued Share Capital -    22,647,911
 
Name                                                          Quantity

PHILDREW NOMINEES LIMITED          A/C LF09                   62,733

PHILDREW NOMINEES LIMITED          A/C LF2O                  681,430

                                                             744,163

                                                                3.28%

From: UBS Global Asset Management

                      This information is provided by RNS
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