Cancellation of Warrants

Software Radio Technology plc ("SRT" or the "Company")             

                           Cancellation of Warrants                            

The Directors of SRT announce that, in accordance with the terms of the warrant
instrument dated 28 October 2005, the exercise period for the conversion of the
Company's quoted warrants into ordinary shares expires at the close of business
on 2 November 2007. Accordingly the admission of the warrants to trading on AIM
will be cancelled with effect from 8.00 a.m. on 5 November 2007.

Enquiries:

Software Radio Technology plc                                      01761 409500
Simon Tucker / Matthew Rogers                                                  

                                                                               
Hanson Westhouse Limited                                          0113 246 2610
Tim Feather / Matthew Johnson