Holding(s) in Company

Radstone Technology PLC
17 October 2006

The Company received the following notification on 17th October 2006 at 11.24:


                                                  Barclays Corporate Secretariat
                                                               1 Churchill Place
                                                                          London
                                                                         E14 5HP
                                                              Tel: [phone]


13th October 2006


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


Dear Sir


Companies Act 1985 ("The Act") - Part VI


I hereby inform you that as at 12 October 2006 Barclays PLC, through the legal
entities listed on the attached schedule, has a notifiable interest in the
capital of your Company of 4.03%

Details of this interest, together with a breakdown between registered holders
(as required by Section 202(3) of the Act), are enclosed.

The issued capital of 30,339, 640 is the latest figure available to us. If this
is incorrect please let me know.

If you have any queries relating to this letter please contact me on 020 7116
2913.


Yours faithfully


Geoff Smith




                              Legal Entity Report


Radstone Tech.                Sedol: 0720483


As at 12 October 2006 Barclays PLC, through the legal entities listed below, had
a notifiable interest in 1,224,019 ORD GBP0.125 representing 4.03% of the issued
share capital of 30,339,640 units.



Legal Entity                                     Holding     Percentage Held

Gerrard Ltd.                                       5,191              0.0171

Barclays Capital Securities Ltd.                 807,300              2.6609

Barclays Life Assurance Co. Ltd.                  31,212              0.1029

Barclays Global Investors Ltd.                   380,316              1.2535


                              Group Holding    1,224,019              4.0344




                           REGISTERED HOLDERS REPORT


Radstone Tech.                Sedol: 0720483


As at 12 October 2006 Barclays PLC, through the registered holders listed below,
had a notifiable interest in 1,224,019 ORD GBP0.125 representing 4.03% of the
issued share capital of 30,339,640 units.


Registered Holder                          Account Designation           Holding

Barclays Capital Nominees Limited                                        807,300

Chase Nominees Ltd                         16376                          16,364

Chase Nominees Ltd                         28270                          14,172

JP Morgan (BGI Custody)                    16341                          17,040

JP Morgan (BGI Custody)                    16400                         202,660

JP Morgan (BGI Custody)                    16482                         136,694

JP Morgan (BGI Custody)                    18409                          24,598

R C Greig Nominees Limited                                                 1,153

R C Greig Nominees Limited                                                 4,038


                TOTAL                                                  1,224,019






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