Blocklisting Interim Review

Radstone Technology PLC
29 June 2006

                        BLOCK LISTING SIX MONTHLY RETURN



To:             Listing Applications

                UK Listing Authority

                Financial Services Authority

                25 The North Colonnade

                Canary Wharf

                London, E14 5HS



Date:   29 June 2006


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:          01.12.2005            To:       31.05.2006

Balance under scheme from previous return:                (1)      399,930

                                                          (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)      21,000
period:
                                                          (2)      Nil

Balance under scheme not yet issued/allotted at end of    (1)      378,930
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     30,339,640 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




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