Annual Information Update

Diploma PLC 11 December 2007 12 CHARTERHOUSE SQUARE LONDON EC1M 6AX TELEPHONE: +44 (0)20 7549 5700 FACSIMILE: +44 (0)20 7549 5715 FOR IMMEDIATE RELEASE 11 December 2007 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 10 December 2007. 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 10 December 2007 2007 Report and Accounts Filing with DVF 10 December 2007 Directors' Interest in Shares 7 December 2007 Holding(s) in Company 3 December 2007 Holding(s) in Company 27 November 2007 Directors' Interest in Shares 27 November 2007 Holding(s) in Company 27 November 2007 Holding(s) in Company 26 November 2007 Directors' Interest in Shares 26 November 2007 Final Results 22 November 2007 Holding(s) in Company 05 October 2007 Holding(s) in Company 25 September 2007 Trading Statement 17 September 2007 Holding(s) in Company 28 August 2007 Acquisition 22 August 2007 Acquisition 03 August 2007 Acquisition 30 July 2007 Holding(s) in Company 17 July 2007 Director/PDMR Shareholding 03 July 2007 Holding(s) in Company 02 July 2007 Change of Address 25 June 2007 Holding(s) in Company 14 June 2007 Holding(s) in Company 13 June 2007 Holding(s) in Company 29 May 2007 Director/PDMR Shareholding 22 May 2007 Holding(s) in Company 14 May 2007 Interim Results 10 May 2007 Holding(s) in Company 19 April 2007 Notice of Results 16 April 2007 Holding(s) in Company 02 April 2007 Director/PDMR Shareholding 29 March 2007 Director/PDMR Shareholding 22 March 2007 Director/PDMR Shareholding 20 March 2007 Holding(s) in Company 20 March 2007 Holding(s) in Company 20 March 2007 Holding(s) in Company 16 March 2007 Holding(s) in Company 09 March 2007 Holding(s) in Company 16 February 2007 Holding(s) in Company 13 February 2007 Holding(s) in Company 07 February 2007 Holding(s) in Company 24 January 2007 Directorate Change 18 January 2007 Holding(s) in Company 17 January 2007 Holding(s) in Company 10 January 2007 AGM Statement 10 January 2007 Trading Statement 22 December 2006 Director/PDMR Shareholding 18 December 2006 Holding(s) in Company 13 December 2006 Holding(s) in Company 13 December 2006 Holding(s) in Company 11 December 2006 Holding(s) in Company 11 December 2006 Holding(s) in Company 07 December 2006 Total Voting Rights 06 December 2006 Annual Information Update 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/PDMR 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 10 December 2007, except for the Annual Return, the Annual Report and the Financial Statements for the year ended 30 September 2006 and the retirement of Lord Stewartby as a Director of the Company and appointment of IM Grice as a Director of the Company. 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 7549 5705 This information is provided by RNS The company news service from the London Stock Exchange

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