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