Blocklisting Interim Review

Radstone Technology PLC
21 December 2005

                        BLOCK LISTING SIX MONTHLY RETURN



To:      Listing Applications

                UK Listing Authority

                Financial Services Authority

                25 The North Colonnade

                Canary Wharf

                London, E14 5HS



Date:   21 December 2005


Name of applicant:                                        RADSTONE TECHNOLOGY PLC
Name of scheme:                                           (1)      Radstone Technology PLC Senior Executive Share Option
                                                                   Scheme

                                                          (2)      Radstone Technology PLC Senior Executive Unapproved  
                                                                   Share Option Scheme

Period of return:                          From:          01.06.2005            To:       30.11.2005

Balance under scheme from previous return:                (1)      418,930

                                                          (2)      1,000,000
The amount by which the block scheme has been increased,  (1)      Nil
if the scheme has been increased since the date of the
last return:                                              (2)      Nil
Number of securities issued/allotted under scheme during  (1)      19,000
period:
                                                          (2)      Nil
Balance under scheme not yet issued/allotted at end of    (1)      399,930
period
                                                          (2)      1,000,000
Number and class of securities originally listed and the  Ordinary Shares of 12.5p each
date of admission
                                                          (1)     400,000 on 22.11.2000 & 512,730 on 12.12.2003

                                                          (2)     1,000,000 on 12.12.2003
Total number of securities in issue at the end of the     30,318,640 Ordinary Shares of 12.5p each
period


Name of contact:                                          Mr. N. Novakovic
Address of contact:                                       Radstone Technology PLC, Tove Valley Business Park, Towcester,
                                                          Northants, NN12 6PF
Telephone number of contact:                              01327 322840



SIGNED BY   _________________________________________________

Director/company secretary/suitably experienced employee/duly authorised
officer, for and on behalf of

_____________________________________

Name of applicant



If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.


                      This information is provided by RNS
            The company news service from the London Stock Exchange