Holding(s) in Company

Diploma PLC
9 June 2003

LETTER TO:  DIPLOMA PLC
            6 June 2003

Disclosure of Interest in shares

Consequent upon a sale in the market of 101,000 shares on the 05 June 2003,
Legal & General Group Plc are now the beneficial owners of the following number
of shares which are not subject to a concert party and will be registered as
follows:
 
Material Interest

HSBC Global Custody Nominee (UK) Ltd A/C 914945                  12,455 
                                                                         
HSBC Global Custody Nominee (UK) Ltd A/c 775245                 100,000 

HSBC Global Custody Nominee (UK) Ltd A/c 357206                 641,603  

HSBC Global Custody Nominee (UK) Ltd A/c 747381                  44,800 

HSBC Global Custody Nominee (UK) Ltd A/c 866203                  32,517 

HSBC Global Custody Nominee (UK) Ltd A/c 754612                       0 

HSBC Global Custody Nominee (UK) Ltd A/c 360509                  19,788
 
                                                                851,163    3.75%
 
Please note that this percentage is based on our understanding that your issued
share capital is 22,647,911, which is the figure quoted by Exshare.

From:  Julia Stone            Group A Signatory

       Kelly Spiteri          Group B Signatory

       Legal & General Investment Management
       
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