Holding(s) in Company

Diploma PLC
28 January 2004

Letter to:  Diploma Plc
Dated:      January 27, 2004

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.

If you have any questions please contact Eleanor Chemlen at [phone] or by 
FAX at [phone].


Amendment #5

NOTIFICATIONS UNDER SECTIONS 198 TO 202 -- UK COMPANIES ACT

1. Company in which shares are held:   DIPLOMA PLC

2. Notifiable Interest:    ORDINARY SHARES

           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), investment 
           manager for various non-US investment companies and institutional 
           clients. (See Schedule A for listing of Registered Shareholders and 
           their holdings).

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 Fidelity International Limited.

4. The notifiable interests include interest held on behalf of authorized
   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 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.


SCHEDULE A

SECURITY: Diploma Plc                                              Amendment # 5


                      SHARES HELD   MANAGEMENT   NOMINEE/REGISTERED NAME
                                     COMPANY    

(Ordinary Shares) 

                         855,759      FISL      Chase Manhattan Bank London
                         200,000      FISL      Chase Nominees Ltd
                          17,600      FIL       Brown Brothers Harriman Ltd. LUX
                         149,400      FIL       Chase Manhattan Bank London
                          22,200      FIL       State Street Bank & Trust

                   
TOTAL ORDINARY SHARES: 1,244,959

CURRENT OWNERSHIP PERCENTAGE:  5.50%

SHARES IN ISSUE:       22,647,910

CHANGE IN HOLDINGS SINCE
 LAST FILING:          (150,435) ordinary shares



Letter from: Fidelity Management & Research Company





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