Holding(s) in Company

Diploma PLC
08 November 2004


                                DIPLOMA PLC
                        20 Bunhill Row, London EC1Y 8UD
              (Registered in England No. 3899848 at above address)
                Telephone: [phone] Fax: [phone]




Company Announcements Office, London Stock Exchange



8 November 2004


Dear Sirs,

We enclose a copy of a letter received today from Barclays PLC notifying their
interest in 4.63% of our issued share capital.


Yours faithfully


N P Lingwood


Company Secretary




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