Holding(s) in Company

Radstone Technology PLC
25 September 2006


The Company has received the following notification:

                                                           ING Wholesale Banking
                                                                  60 London Wall
                                                                          London
                                                                        EC2M 5TQ
                                                          Tel : [phone]


21 September 2006

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


Dear Sir/Madam


Re: Radstone Technology Plc (GB0007204836)


I write to inform you that at the close of business on 20 September 2006, ING
Bank NV held 984,872 ordinary shares in Radstone Technology Plc. We understand
that based on an issued share capital of 30,339,640 our holding amounts to 3.25%
of the shares in issue.


Our interest is legal and beneficial and we make this disclosure in accordance
with our obligations under s198 of the Companies Act.


Yours faithfully

Nigel Wallace-Mason

Equity Compliance Officer


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