Holding(s) in Company

Diploma PLC
13 December 2006


To: Diploma Plc


Enclosed are amended notifications of disclosable interests under the U.K.
Companies Act 1985. Please note that while this information details the
disclosable interests of more than one entity, the enclosed disclosure
constitutes separate notifications of interest which have been combined solely
for purposes of clarity and efficiency. It is not intended to indicate that any
of these entities act as a group or in concert with respect to these interests.

These disclosures are made in the interest of conformity with the Companies Act.
The interest detailed herein were acquired solely for investment purposes. For
disclosure purposes, holdings should be represented as Fidelity International
Limited (FIL) and its direct and indirect subsidiaries, being non-beneficial
holders.




Teresa Garry
Regulatory Reporting Analyst
Fidelity International




Closing Amendment

NOTIFICATIONS UNDER SECTIONS 198 TO 202 -  U.K. COMPANIES ACT

1. Company in which shares are held:              Diploma Plc

2. Notifiable Interest:                           Ordinary Shares

(A)   FMR Corp.
      82 Devonshire Street 
      Boston, MA 02109

Parent holding company of Fidelity Management & Research Company (FMRCO),
Investment manager for US mutual funds, and Fidelity Management Trust Company
(FMTC), a US state chartered bank which acts as a trustee or investment manager
of various pension and trust accounts. (See Schedule A for listing of Registered
Shareholders and their holdings).

(B)  Fidelity International Limited (FIL)
     P.O. Box HM 670
     Hamilton HMCX, Bermuda

Parent holding company for various direct and indirect subsidiaries, including
Fidelity Investment Services Ltd, (FISL), Fidelity Gestion (FIGEST), Fidelity
Investments Advisory (Korea) Limited (FIA(K)L), Fidelity Investments Management
(Hong Kong) Limited (FIMHK), Fidelity Pension Management (FPM), Fidelity
Investments Japan (FIJ) and Fidelity Investments International (FII), investment
managers for various non-US investment companies and institutional clients.


3. The notifiable interests also comprise the notifiable interest of:

     Mr. Edward C. Johnson 3d
     82 Devonshire Street
     Boston, MA 02109

A principal shareholder of FMR Corp. and Fidelity International Limited.

4. The notifiable interests include interest held on behalf of authorised unit
trust schemes in the U.K., notwithstanding the exemption from reporting pursuant
to Section 209 (1)(h) of the Companies Act 1985.
     
5.  These notifications of disclosable interests constitute separate
notifications of interest in the shares and are combined solely for the purposes
of clarity and efficiency. Nothing herein should be taken to indicate that FMR
Corp. and its direct and indirect subsidiaries, Fidelity International Limited
and its direct and indirect subsidiaries or Mr. Edward C. Johnson 3d act as a
group or in concert in respect of the disclosed interests, or that they are
required to submit these notifications on a joint basis.

6.  The disclosable interests arise under section 208 (4) (b) of the Act, namely
where a person, not being the registered holder, is entitled to exercise a right
conferred by the holding of the shares or to control the exercise of such
rights, or under section 203 of the Act respectively.

7.  Inasmuch as there is no disclosable interest of 3% or greater of the share
capital, FMR Corp. and its direct and indirect subsidiaries, and Fidelity
International Limited and its direct and indirect subsidiaries have no further
reporting obligation under Section 198 to 202 of the UK Companies Act. This
statement speaks as of its date, and no inference should be drawn that no change
has occurred in the facts set forth herein after the date hereof.


By:
Rani Jandu    
Regulatory Reporting Senior Manager, FIL - Investment Compliance 
Duly authorized under Powers of Attorney dated August 25,2004 by Eric D. Roiter 
by and on behalf of FMR Corp. and its direct and indirect subsidiaries, and 
Fidelity International Limited and its direct and indirect subsidiaries.



Schedule A                                                    Closing Amendment


Security: DIPLOMA PLC

Current ownership percentage:                   2.93%

Total Shares Held                             664,301

Shares In Issue:                           22,647,911

Change in holdings since last filing:     (220,277) ordinary shares


                                  MANAGEMENT 
                 SHARES HELD        COMPANY      NOMINEE/REGISTERED NAME

                     78,200         FPM          NORTHERN TRUST LONDON
                     35,433         FPM          JP MORGAN, BOURNEMOUTH
                    145,400         FMRCO        STATE STREET BANK AND TR CO
                      6,868         FISL         JP MORGAN, BOURNEMOUTH
                    398,400         FIL          BROWN BROS HARRIMN LTD LUX



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