Director/PDMR Shareholding

SOFTWARE RADIO TECHNOLOGY PLC                         

                           ("SRT" or the "Company")                            

                          DIRECTOR/PDMR SHAREHOLDING                           

Software Radio Technology plc has been notified that Andrew Lapping, a
Non-Executive Director of the Company, acquired 50,000 ordinary shares of 0.1p
each in SRT at a price of 20.9 pence per share on 12 July 2012. Following this
acquisition, Mr. Lapping is interested in 1,131,080 ordinary shares,
representing 0.98 per cent. of the Company's issued share capital.

Enquiries:

Software Radio Technology plc           [phone]                     
                                                                               
Simon Tucker                            [e-mail]           
                                                                               
Chief Executive Officer                                                        
                                                                               
Westhouse Securities Limited            [phone]                    
                                                                               
Richard Baty                                                                   
                                                                               
Petre Norton                                                                   
                                                                               
Allerton Communications                 [phone]                   
                                                                               
Peter Curtain                                                                  

About SRT

Software Radio Technology plc, develops advanced radio communications
technologies which are used to create enabling modules and OEM products. SRT
Marine Technology Limited focuses on VHF and AIS technologies for use in
navigation and homeland security identification and tracking applications. SRT
Marine Technology provides its solutions in a variety of module and OEM product
formats.