Holding(s) in Company

Radstone Technology PLC
20 April 2005

The company has received the following announcement:

                                       Citigroup

                                       Data Control
                                       1 Calton Square
                                       2-Floor, Greenside
                                       Edinburgh
                                       EH1 3AJ

                                       Fax: [phone]
                                       Tel: [phone]


Company Secretary
Radstone Technology

12 April 2005

Dear Sir/Madam,

Radstone Technology Ord GBP0.125 shares

In terms of Part VI of the Companies Act 1985 (as amended), I have to inform you
on behalf of Standard Life Investments that on 19/04/05, Standard Life
Investments disposed of 1469,676 shares on behalf of Standard Life Group.  This
decreased the total held as a material interest to 637,298 shares being 3% of
the issued stock of that class.

                     No. of shares held         Registered Name

                              637,298           Vidacos Nominees



Yours faithfully

Data Control




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