Holding in Company

Diploma PLC
11 August 2000


Letter to Diploma Plc

Companies Act 1985

Disclosures of Interest in Voting Shares

In compliance with Part VI of the above Act, as amended, I inform you that, as a
result of recent purchases, the interest of Prudential Plc, in the following
class of voting shares in your company, is now as specified below:-


Letter from Prudential Portfolio Managers Limited

                                NOTIFIABLES
                              Position Report

SEDOL:  0182663          Client Fund Reporting Group: PPMB

DIPLOMA                 
 0182663 ORD GBP0.05   

                Shares in  Registered Holder                 Current   Holding
                  Issue                                      Holding      %

               25,164,345  PRUCLT HSBC GIS NOM(UK) PAC AC   1,272,167

               25,164,345                                   1,272,167    5.05