Holding(s) in Company

Radstone Technology PLC
06 October 2006


The Company has received the following notification:

                                                                          UBS AG
                                                       Legal & Compliance Europe
                                                            100 Liverpool Street
                                                                          London
                                                                        EC2M 2RH
                                                          Tel : [phone]
                                                           Fax: [phone]

The Company Secretary
Radstone Technology PLC
Tove Valley Business Park
Towcester
Northants
NN12 6PF

[phone]

4th October 2006


Dear Sir/Madam,

Section 198 Companies Act 1985

Pursuant to Section 198 of the Companies Act 1985 we write to inform you that as
at the close of its business on 2nd October 2006, UBS AG, acting through its
business group and legal entities detailed below, had an interest in 914,281
Ordinary shares of Radstone PLC, representing 3.01 per cent of the issued share
capital of the Company (1,115,259,000).

None of the Relevant Shares are shares in which UBS AG is interested by virtue
of Section 208(5) of The Act.

UBS business group / legal entity              Breakdown of position held (%)

UBS Global Asset Management Life Limited       323,258 shares          1.07%
UBS AG (Switzerland)                           591,023 shares          1.95%
UBS AG - Total                                 914,281 shares          3.01%


If you require any further information concerning this notification, please
contact Nimisha Sachdev in the EMEA Compliance Department of UBS AG London
Branch on Tel: [phone].


Yours faithfully

Angela Huff                                  Paul Geraldine
Associate Director - Compliance              Director - Compliance


                      This information is provided by RNS
            The company news service from the London Stock Exchange