Holding(s) in Company

Radstone Technology PLC
21 September 2006




The Company has received the following notification:


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


19 September 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 18 September 2006 Barclays PLC, through the legal
entities listed on the attached schedule, has a notifiable interest in the
capital of your Company of 3.47%

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 18 September 2006 Barclays PLC, through the legal entities listed below,
had a notifiable interest in 1,053,208 ORD GBP0.125 representing 3.47% of the
issued share capital of 30,339,640 units.


Legal Entity                        Holding                 Percentage Held

Gerrard Ltd
Barclays Life Assurance Co Ltd        5,191                  .0171
Barclays Capital Securities Ltd      25,308                  .0834
Barclays Global Investors Ltd       647,300                 2.1335
Gerrard Ltd                         375,409                 1.2374

Group Holding                     1,053,208                 3.4714




                            REGISTERED HOLDERS REPORT


Radstone Tech.              Sedol: 0720483

As at 18 September 2006 Barclays PLC, through the registered holders listed
below, had a notifiable interest in 1,053,208 ORD GBP0.125 representing 3.47% of
the issued share capital of 30,339,640 units.


Legal Entity                         Holding                Percentage Held

Barclays Capital Nominees Limited                           409,300
Barclays Capital Nominees Limited                           238,000
Chase Nominees Ltd                   16376                   13,390
Chase Nominees Ltd                   28270                    8,268
JPMorgan (BGI Custody)               16341                   17,040
JPMorgan (BGI Custody)               16400                  202,660
JPMorgan (BGI Custody)               16482                  139,052
JPMorgan (BGI Custody)               18409                   19,767
R C Greig Nominees Limited                                    1,153
R C Greig Nominees Limited a/c AK1                            4,038
                                     Total                1,053,208



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