Holding in Company

Diploma PLC 30 May 2001 Letter to Diploma plc DIPLOMA PLC (THE 'COMPANY') - SEDOL 0182663 This notification supersedes our previous notification to you dated 16 February 2001. 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 CGNU 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 1,821,641 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 attached Appendix: Morley Fund Management Limited. 2. Notification on behalf of CGNU plc 2.1 We hereby notify you on behalf of CGNU plc that immediately after the time when the obligation to make this notification arose CGNU plc were interested in 1,821,641 shares giving the CGNU group a total percentage interest in the shares of 7.24%. 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 attached Appendix: CGNU 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. Letter from CGNU plc APPENDIX: MORLEY FUND MANAGEMENT LIMITED REGISTERED HOLDERS NUMBER OF SHARES HELD BNY Norwich Union Nominees Ltd 1,325,430 (Material) Chase GA Group Nominees Ltd 254,211 (Material) CUIM Nominee Ltd 142,000 (Material) RBSTB Nominees Ltd 100,000 (Material) TOTAL PERCENTAGE INTEREST OF MORLEY FUND MANAGEMENT LIMITED: 7.24% ISSUED SHARE CAPITAL ON WHICH THIS NOTIFICATION IS BASED: 25,164,345 APPENDIX: CGNU PLC REGISTERED HOLDERS NUMBER OF SHARES HELD BNY Norwich Union Nominees Ltd 1,325,430 (Material) Chase GA Group Nominees Ltd 254,211 (Material) CUIM Nominee Ltd 142,000 (Material) RBSTB Nominees Ltd 100,000 (Material) TOTAL PERCENTAGE INTEREST OF CGNU PLC: 7.24% ISSUED SHARE CAPITAL ON WHICH THIS NOTIFICATION IS BASED: 25,164,345

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Diploma (DPLM)
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