Annual Information Update

Diploma PLC
02 December 2005


     FOR IMMEDIATE RELEASE

                                                              2 December 2005

                                  DIPLOMA PLC
                            ANNUAL INFORMATION UPDATE
                                        
    In accordance with Prospectus Rule 5.2 the following information has been
     published or made available to the public in the last twelve months ended 2
     December 2005.

     The following regulatory announcements have been made via the Regulatory
     News Service provided by the London Stock Exchange, through which copies
     can be obtained.

     Date of Announcement               Regulatory Headline

     11.01.05                           AGM Statement
     11.01.05                           Results of AGM
     18.01.05                           Director Shareholding
     20.04.05                           Notice of Interim Results
     26.04.05                           Holding(s) in Company
     09.05.05                           Announcement of Interim Results
     18.05.05                           Director Shareholding
     19.05.05                           Director Shareholding
     22.08.05                           Holding(s) in Company
     28.09.05                           Trading Statement
     20.10.05                           Holding(s) in Company
     26.10.05                           Director Shareholding
     14.11.05                           Announcement of Preliminary Results
     21.11.05                           Holding(s) in Company
     28.11.05                           Holding(s) in Company
     30.11.05                           Acquisition of HKX Inc
     02.12.05                           Director Shareholding
     02.12.05                           Director Shareholding (LTIP Awards)
     02.12.05                           2005 Report and Accounts filing with DVF


     In accordance with the provisions of Article 27.3 of the Prospectus
     Directive Regulation, we confirm that to the best of our knowledge,
     information relating to 'Holding(s) in Company' and 'Director Shareholding'
     is up to date at the date of this Announcement, but it is acknowledged that
     such disclosures may, at any time, become out of date, due to changing
     circumstances.

     Details of all regulatory headlines listed above can be downloaded from the
     Company's website at www.diplomaplc.com and any related documents are
     available at the UKLA's Document Viewing Facility, Financial Services
     Authority, 25 The Colonnade, Canary Wharf, London E14 5HS.

     The Company has made no filings with Companies House during the 12 months
     ended 2 December 2005, except for the Annual Return and the Annual Report
     and the Financial Statements for the year ended 30 September 2004. Copies
     of these documents can be found on the Companies House website at
     www.direct.companies.gov.uk


     For further enquiries please contact:

     Nigel Lingwood, Group Finance Director                 020 7448 4875


     NOTE TO EDITORS:

     Diploma PLC is a specialised international distribution group operating in
     three sectors:

     Life Sciences - Distributors of Instrumentation, Consumables and related
     Services to research, development and diagnostic laboratories. Principal
     companies are Anachem Group in the UK and Germany, and Somagen in Canada.
     Seals- Next day delivery of hydraulic seal kits, gaskets and cylinder
     components, for the repair and maintenance of mobile machinery. Principal
     companies are Hercules Bulldog Sealing Products in North America and FPE in
     the UK.

     Controls - Distributors of specialised wiring, connectors and control
     devices for a range of technically demanding applications. Principal
     companies are IS Group in the UK and US, Sommer and Filcon in Germany and
     Hawco in the UK.

     Within each of these sectors, the Diploma businesses serve industry
     segments with long term growth potential and with the opportunity for
     sustainable superior margins through the quality of customer service, depth
     of technical support and value adding activities.



     Further information on Diploma PLC can be found at www.diplomaplc.com




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