Holding(s) in Company

Radstone Technology PLC
16 March 2006


The company has received the following announcements:

                                              Gartmore Investment Management Plc
                                                                  Gartmore House
                                                               8 Fenchurch Place
                                                                          London
                                                                        EC3M 4PB
                                                              Tel: [phone]


8 March 2006


The Company Secretary
Radstone Technology Plc
Tove Valley Business Park
Towcester
Northhamptonshire
NN12 6JN


Dear Sir/Madam


RE : RADSTONE TECHNOLOGY PLC


We, Gartmore Investment Limited (GIL), Gartmore Fund Managers Limited (GFM) and
Gartmore Global Partners (GGP), write to advise you pursuant to Section 198 of
the Companies Act 1985 (the "Act") as amended by the Disclosure of Interest in
Shares (amendment) Regulations 1993, that we have increased our reportable
interest in your company due to the purchase of 24,820 shares priced at GBP
2.7961 on 13th March 2006, and a purchase of  14,231shares priced at GBP 2.81 on
14th March 2006.



1. This notification relates to the ordinary GBP0.125 share capital of Radstone 
   Technology plc



2. The number of shares of the person(s) with an interest, for the purposes
   of Section 208 and 209 of the Act, immediately after the time when the
   obligation arose, are shown on the attached schedule.



3. The identities of the registered holders of these shares and the number
   of shares held by each holder, so far as is known at the date of this
   notification, are shown on the attached schedule.


4. The percentages quoted on the attached schedule are based on your issued
   share capital of 30,3187,640 as advised to us by Exshare.


5. The total number of shares comprises the aggregated holdings controlled
   by GIL, GFM, and GGP, as discretionary investment managers of the clients and
   client funds listed on the attached schedule and; accordingly have voting power
   in respect of the shares and power to dispose of them.


6. The shares are held for investment purposes only for the clients and
   client funds concerned and we do not know of anyone who is or was party to any
   agreement to which Section 204 of the "Act" applies.

Yours faithfully

For and on behalf of Gartmore Investment Management plc

Alan Buddles

Head of Restriction and Disclosures Unit


                        Current Holdings By Fund Manager


Stock Line: 0720483 RADSTONE TECH ORD GBP0.125

Fund Managing Co.    Number of Issued     Percentage  UK Registered Owner              Fund    Beneficial Owner
                     Shares    Share      of Issued
                     Held      Capital    Capital

Gartmore Fund        8,869                0.029%      Vidacos Nominees Limited A/C     UKINO   Gartmore Fund Managers
Managers Ltd                                                                                   Limited Gartmore U.K.
                                                                                               Index Trust

Gartmore Fund        1,203,174            3.968%      HSBC Global Custody Nominee UK   56690   Gartmore Fund managers
Managers Ltd                                          Ltd                                      Ltd A/C Gartmore UK &
                                                                                               Irish Smaller
                                                                                               Companies
                     1,212,043            3.998%

Gartmore Investment  221,856              0.732%      Bank of Bermuda Luxembourg       SICAV3  Gartmore SICAV Pan
Ltd                                                                                            Euro Smaller Companies
                                                                                               Fund
Gartmore Investment  376,181              1.241%      BNY GIL CLT A/C Noms Ltd A/C LST LST     Gartmore Smaller
Ltd                                                                                            Companies Trust Plc

Gartmore Investment  152,517              0.503%      BNY GIL CLT A/C Noms Ltd A/C     56640   Gartmore Growth
Ltd                                                   NWSC                                     Opportunities Plc

Gartmore Investment  692,572              2.284%      Nortrust Nominees Ltd            54550   Strathclyde Pension
Ltd                                                                                            Fund

Gartmore Investment  670,131              2.210%      HSBC Global Investor Services    63165   Swiss Federal Social
Ltd                                                                                            Security Fund

Gartmore Investment  25,000               0.082%      BNY GIL CLT A/C Noms Ltd A/C     GAGIG   Gartmore Absolute
Ltd                                                   GAGIG                                    Growth and Income
                                                                                               Trust Plc (Growth)
                     2,138,257            7.053%

                     3,350,300 30,318,640 11.050%


                                                                   End of Report

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