Diploma Regulatory News (DPLM)

DIPLOMA PLC

12 CHARTERHOUSE SQUARE, LONDON EC1M 6AX

TELEPHONE: +44 (0)20 7549 5700

FACSIMILE: +44 (0)20 7549 5715

FOR IMMEDIATE RELEASE

9 December 2011

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 twelve months ended 8 December 2011.

1. RNS Announcements

The following UK regulatory announcements have been made via RNS, a Regulatory Information Service and can be obtained from the London Stock Exchange website, www.londonstockexchange.com or The National Storage Mechanism at www.hemscott.com/nsm.do or the Company's website at www.diplomaplc.com.

2. Documents filed at Companies House

The documents listed below were filed with the Registrar of Companies at Companies House on or around the dates indicated below and can be obtained from Companies House, Crown Way, Cardiff C14 3UZ or through Companies House Direct at www.direct.companieshouse.gov.uk.

3. Documents published and filed with the NSM

The following documents have been published and can be obtained from the National Storage Mechanism at www.hemscott.com/nsm.do or the Company's website at www.diplomaplc.com.

This annual information update is required by and is being made pursuant to Article 10 of the Prospectus Directive as implemented in the United Kingdom (Prospectus Rule 5.2) and not for any other purpose and neither the Company, nor any other person, takes any responsibility for, or makes any representation, expressed or implied, as to the accuracy or completeness of, the information which it contains. This information is not necessarily up to date as at the date of the annual information update and the Company does not undertake any obligation to update any such information in the future. This annual information update does not constitute an offer of any securities addressed to any person and should not be relied on by any person.