Holding(s) in Company

Radstone Technology PLC
29 September 2006

The company has received the following notification:





                                                                       AVIVA plc
                                                                       PO Box 89
                                                                   Surrey Street
                                                                         Norwich
                                                                         NR1 3DR
                                                       Direct Line: 01603 843362


28 September 2006


The Company Secretary
Radstone Technology plc
Tove Valley Business Park
Towcester
Northamptonshire
NN12 6JN

Dear Sir



RADSTONE TECHNOLOGY PLC - SEDOL 0720483



The attached notification is provided to you, on behalf of Aviva plc and its
subsidiaries, and in fulfilment of the obligations imposed by sections 198 to
202 of the Companies Act 1985.



If in future you would prefer to receive these notifications via e-mail please
could you provide a suitable e-mail address that could be used for this purpose.
Please direct your reply to [e-mail].




Yours faithfully





Denise Peart
For and on behalf of Aviva plc






                   NOTIFICATION OF MAJOR INTERESTS IN SHARES





1. Name of company



Radstone Technology plc



2. Name of shareholder having a major interest



Aviva plc and its subsidiaries



3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18



As in 2 above



4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them



Morley Fund Management Ltd:

BNY Norwich Union Nominees Limited           336,069*

Chase GA Group Nominees Limited              710,969*

Chase Nominees Limited                       111,157*

CUIM Nominee Limited                         324,268*

Vidacos Nominees Limited                      31,777*



*denotes beneficial interest



5. Number of shares/amount of stock acquired



n/a



6. Percentage of issued class



n/a



7. Number of shares/amount of stock disposed



489,000



8. Percentage of issued class



1.61%



9. Class of security



Ordinary GBP0.125 shares



10. Date of transaction



27 September 2006



11. Date company informed



28 September 2006



12. Total holding following this notification



1,514,240*



* beneficial interest only



13. Total percentage holding of issued class following this notification



4.99%



14. Any additional information



Figures are based on shares in issue of 30,339,640



15. Name of contact and telephone number for queries







16. Name and signature of authorised company official responsible for making
this notification.







Date of notification







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document or material and does not accept any liability for error or omission.
The FSA is not liable for any damages (including, without limitation, damages
for loss of business or loss of profits) arising in contract, or otherwise from
the use of or inability to use this document, or any material contained in it,
or from any action or decision taken as a result of using this document or any
such material.






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