Announcement Released in Error

SOFTWARE RADIO TECHNOLOGY PLC                         

                           ("SRT" or the "Company")                            

                        Announcement Released in Error                         

SRT advises that the announcement released today at 14.59 was issued in error
by the Company's regulatory information service and is a copy of the
announcement released on 19 May 2011.

Enquiries                                                                    
                                                                             
Software Radio Technology plc                              [phone]
                                                                             
Simon Tucker                                     [e-mail]
                                                                             
Chief Executive Officer                                                      
                                                                             
Westhouse Securities Limited                              [phone]
                                                                             
Tim Feather                                                                  
                                                                             
Matthew Johnson