Holding(s) in Company

Diploma PLC
3 December 2003

Letter to Diploma PLC dated 2 December 2003


Companies Act 1985 (as amended):
Disclosure of Interests in Shares

In accordance with Part VI of the Companies Act 1985 (as amended) (the 'Act'), 
we write to inform you that Prudential plc and certain of its subsidiary 
companies have a notifiable interest in the issued share capital of your company 
as detailed in the attached schedule.

From Prudential PLC
M&G Investment Management


          Notifiable Position Report for DIPLOMA ORD GBP0.05
                       as at 01 December 2003


Percentage holdings are calculated using an issued share capital of 
22,647,911 ORD GBP0.05 shares


                 Registered Holder                 Holding    %
Prudential PLC                                     832,000    3.67 Total Notifiable Interest
                 PRUCLT HSBC GIS NOM(UK) PAC AC    810,000
                 PRUCLT HSBC GIS NOM(UK) PPL AC     22,000

The Prudential Assurance Company Limited           832,000    3.67
                 PRUCLT HSBC GIS NOM(UK) PAC AC    810,000
                 PRUCLT HSBC GIS NOM(UK) PPL AC     22,000


                      This information is provided by RNS
            The company news service from the London Stock Exchange           KPDBDDNBK