Holding(s) in Company

Diploma PLC
1 December 2003

LETTER TO:  DIPLOMA PLC

DATED:  28 NOVEMBER 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.

For the purposes of S210 of the Act, the address for those companies identified
in the attached schedule is Laurence Pountney Hill London EC4R OHH.

LETTER FROM:    M& G Investment Management

      Notifiable Position Report for DIPLOMA ORD GBP0.05
                   as at 27 November 2003

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



                  Registered Holder                 Holding     %

Prudential plc                                      932,000   4.11   Total Notifiable Interest

                  PRUCLT HSBC GIS NOM(UK) PAC AC    910,000
                  PRUCLT HSBC GIS NOM(UK) PPL AC     22,000

The Prudential Assurance Company Limited            932,000

                  PRUCLT HSBC GIS NOM(UK) PAC AC    910,000   4.11%  
                  PRUCLT HSBC GIS NOM(UK) PPL AC     22,000



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