Holding(s) in Company

Diploma PLC
28 March 2003


Letter to: Diploma plc


DIPLOMA PLC (THE 'COMPANY') - SEDOL 0182663

This notification supersedes our previous notification to you dated 12 December
2002 and is prompted by net sales totalling 167,940 on 27 March 2003.

This notification relates to issued ordinary shares of GBP0.05 each in the 
capital of the Company (the 'shares') and is given in fulfilment of the
obligations imposed by sections 198 to 202 of the companies Act 1985 (the
'Act').

1.   Notification on behalf of Morley Fund Management Limited (a subsidiary of
     Aviva plc).

1.1  We hereby notify you on behalf of Morley Fund Management Limited
     that immediately after the time when the obligation to make this
     notification arose Morley Fund Management Limited were interested in
     1,309,264 shares.

1.2  The identity of the registered holders of the shares to which this
     notification relates and the number of shares held by each of them are set
     out in the Appendix below: Morley Fund Management Limited.

2.   Notification on behalf of Aviva plc.

2.1  We hereby notify you on behalf of Aviva plc that immediately after the
     time when the obligation to make this notification arose Aviva plc were
     interested in 1,309,264 shares giving the Aviva group a total percentage
     interest in the shares of 5.78%.

2.2  The identity of the registered holders of the shares to which this
     notification relates and the number of shares held by each of them are set
     out in the Appendix below: Aviva plc.

We are only required to notify interests which are defined as material interests
when the holding is equal to 3% or more of the Company's relevant share capital.
The term material interests exclude certain categories where we do not hold a
beneficial interest, for example where the shares are held in an Authorised Unit
Trust Scheme or Open Ended Investment Company. Holdings in those categories are
therefore not included in the holding notified under this letter. 




APPENDIX: MORLEY FUND MANAGEMENT LIMITED

REGISTERED HOLDERS                                NUMBER OF SHARES HELD

BNY Norwich Union Nominees Ltd                     176,871   (Material)
Chase GA Group Nominees Ltd                        748,577   (Material)
CUIM Nominee Ltd                                   308,287   (Material)
RBSTB Nominees Ltd                                  75,529   (Material)


TOTAL PERCENTAGE INTEREST OF MORLEY FUND MANAGEMENT LIMITED:          5.78%

ISSUED SHARE CAPITAL ON WHICH THIS NOTIFICATION IS BASED:        22,647,911




APPENDIX: AVIVA PLC

REGISTERED HOLDERS                              NUMBER OF SHARES HELD

BNY Norwich Union Nominees Ltd                    176,871  (Material)
Chase GA Group Nominees Ltd                       748,577  (Material)
CUIM Nominee Ltd                                  308,287  (Material)
RBSTB Nominees Ltd                                 75,529  (Material)


TOTAL PERCENTAGE INTEREST OF AVIVA PLC:                           5.78%

ISSUED SHARE CAPITAL ON WHICH THIS NOTIFICATION IS BASED:    22,647,911




From: AVIVA plc


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