Holding(s) in Company

Radstone Technology PLC
20 May 2005

The Company has received the following notifications:



M&G Investment Management Limited
Laurence Pountney Hill
London EC4R 0HH





20 May 2005



The Company Secretary
Radstone Technology plc
Water Lane
Towchester
Northamptonshire
NN12 6JN



Fax: [phone]





Dear Sir/Madam



Companies Act 1985

Disclosures of Interests in Voting Shares - Changes in Corporate Structure



In compliance with Part VI of the above Act, as amended, I inform you that
following changes in the Corporate Structure of Prudential plc, the attributable
ownership for some funds currently managed by Prudential plc and Group Companies
has changed from that previously notified to you.



The names of the registered holders which comprise our notifiable interest in
the voting shares in your company are listed on the attached schedule.



It must be stressed that the total interest of Prudential plc in the voting
shares of your company remains unchanged, however it is the change in interest
of certain subsidiary companies within the group that has generated the need for
this disclosure.



Yours faithfully







Richard Harding

For and on behalf of Prudential plc



Direct Line: 020 7548 3183

Direct Fax: [phone]











           Notifiable Position Report for RADSTONE TECH. ORD GBP0.125

                               As at 18 May 2005



Percentage holdings are calculated using an issued share capital of 30,299,640
ORD GBP0.125 shares





                   Registered Holder                  Holding                %
                                             
Prudential plc                                        4,436,439            14.64 Total Notifiable Interest
                   BK OF NEW YORK (NOMS) LTD 636922     663,873
                   CHASE NOMS LTD                        19,428
                   NORTRUST NOMINEE LTD A/C MHFO1         8,482
                   NORTRUST NOMINEE LTD A/C/ MKMO1      894,565
                   NORTRUST NOMS LTD A/C MEL01          375,336
                   NORTRUST NOMS LTD A/C PUQ0           881,688
                   PRUCLT HSBC GIS NOM(UK) PAC AC     1,201,240
                   PRUCLT HSBC GIS NOM(UK) PPL AC       391,827



M&G Group Limited                                     3,772,566            12.45
                   CHASE NOMS LTD                        19,428
                   NORTRUST NOMS LTD A/C MHF01            8,482
                   NORTRUST NOMS LTD A/C MKM01          894,565
                   NORTRUST NOMS LTD A/C MEL01          375,336
                   NORTRUST NOMS LTD A/C/ PUQ01         881,688
                   PRUCLT HSBC GIS NOM(UK) PAC AC     1,201,240
                   PRUCLT HSBC GIS NOM(UK) PPL AC       391,827


M&G Investment Management Ltd                         3,764,084            12.42
                   CHASE NOMS LTD                        19,428
                   NORTRUST NOMINEES LTD A/C MKM01      894,565
                   NORTRUST NOMS LTD A/C MEL01          375,336
                   NORTRUST NOMS LTD A/C/ PUQ01         881,688
                   PRUCLT HSBC GIS NOM(UK) PAC AC     1,201,240
                   PRUCLT HSBC GIS NOM(UK) PPL AC       391,827


M&G Limited                                           3,772,566            12.45
                   CHASE NOMS LTD                        19,428
                   NORTRUST NOMS LTD A/C MHF01            8,482
                   NORTRUST NOMS LTD A/C MKM01          894,565
                   NORTRUST NOMS LTD A/C MEL01          375,336
                   NORTRUST NOMS LTD A/C/ PUQ01         881,688
                   PRUCLT HSBC GIS NOM(UK) PAC AC     1,201,240
                   PRUCLT HSBC GIS NOM(UK) PPL AC       391,827



The Prudential Assurance Company Limited              1,593,067             5.25
                   PRUCLT HSBC GIS NOM(UK) PAC AC     1,201,240
                   PRUCLT HSBC GIS NOM(UK) PPL AC       391,827




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