Year End Trading Update

SOFTWARE RADIO TECHNOLOGY PLC                         

                           ("SRT" or the "Company")                            

                            YEAR END TRADING UPDATE                            

Software Radio Technology announces that it will publish its Final Results for
the year ended 31 March 2011, on Tuesday 21 June 2011.

Subject to audit, the Company expects to report turnover of approximately £9
million, an increase of over 160% on the previous year, with a profit after tax
of approximately £2 million, against a loss for the same period last year. Year
end cash balances are expected to be approximately £3 million despite an
increase in stock to approximately £1.5 million to support an accelerated
product development programme and future revenue growth. The Company remains
debt free.

Simon Tucker, CEO of SRT, said, "We are seeing strong demand for our products
in this rapidly growing global market, which is starting to be reflected in our
financial performance. We now have over 40 customers globally and our order
book continues to develop as the impact of AIS mandates is felt in the market.

"With our expanding range of market leading, innovative products and services,
we remain confident in SRT's continuing growth."

                                    -ends-                                     

Enquiries:                                                                   
                                                                             
Software Radio Technology plc                              [phone]
                                                                             
Simon Tucker                                     [e-mail]
                                                                             
Chief Executive Officer                                                      
                                                                             
Westhouse Securities Limited                              [phone]
                                                                             
Tim Feather                                                                  
                                                                             
Matthew Johnson                                                              
                                                                             
Leander PR                                                [phone]
                                                                             
Christian Taylor-Wilkinson                                                   

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.