Holding(s) in Company

Radstone Technology PLC 05 April 2005 The company has received the following notification: AVIVA plc P O Box 89 Surrey Street Norwich NR1 3DR Direct Line: 01603 843362 1 April 2005 The Company Secretary Radstone Technology plc Tove Valley Business Park Towcester Northamptonshire NN12 6JN Dear Sir RADSTONE TECHNOLOGY PLC (THE "COMPANY") - SEDOL 0720483 This notification supersedes our previous notification to you dated 30 March 2005 and is prompted by purchases totalling 507,733 on 31 March 2005. This notification relates to issued ordinary shares of GBP0.125 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 1,493,979 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 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 1,493,979 shares giving the Aviva group a total percentage interest in the shares of 4.93% 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: Aviva plc. If you require further information as to which companies in the Aviva group hold interests in the shares (by virtue of s.203 of the Act) please submit a written request and we will be happy to supply this information. We are only required to notify interests which are defined as material interest 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. If you wish us to confirm the level of holdings in these categories, please let us know. Yours faithfully Abby Condick For and on behalf of Aviva plc The Company Secretary 1 April 2005 Radstone Technology plc Appendix: Morley Fund Management Limited Registered Holders Number of Shares held BNY Norwich Union Nominees Ltd 236,831 (Material) Chase GA Group Nominees Ltd 831,355 (Material) CUIM Nominee Ltd 425,793 (Material) Total percentage interest of Morley Fund Management Limited: 4.93% Issued share capital on which this notification based: 30,299,640 The Company Secretary 1 April 2005 Radstone Technology plc Appendix: AVIVA PLC Registered Holders Number of Shares held BNY Norwich Union Nominees Ltd 236,831 (Material) Chase GA Group Nominees Ltd 831,355 (Material) CUIM Nominee Ltd 425,793 (Material) Total percentage interest of Morley Fund Management Limited: 4.93% Issued share capital on which this notification based: 30,299,640 This information is provided by RNS The company news service from the London Stock Exchange

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