Holding(s) in Company

SOFTWARE RADIO TECHNOLOGY PLC                         

                              HOLDING IN COMPANY                               

On 1 December 2006, Software Radio Technology plc was informed that, at the
close of business on 29 November 2006, UBS AG, acting through its business
group and legal entities detailed below, had an interest in 3,170,934 ordinary
shares, representing 4.06 per cent. of the issued share capital.

                                                              Shares  Per cent.
                                                                               
UBS AG London Branch                                       3,170,934       4.06
                                                                               
UBS AG - Total                                             3,170,934       4.06

Enquiries:

Software Radio Technology plc                                      01761 409500
                                                                               
Matthew Rogers                                   [e-mail]
                                                                               
Hanson Westhouse LLP                                              0113 246 2611
                                                                               
Tim Feather                                     [e-mail]