Live Shareholder Webcast

SOFTWARE RADIO TECHNOLOGY PLC                         

                           ("SRT" or the "Company")                            

                           Live Shareholder Webcast                            

On Thursday 21 April 2011 at 7.15 a.m. GMT, AIM-quoted marine electronics
developer, SRT will host its second live shareholder webcast open to existing
and prospective private and institutional investors.

Simon Tucker, SRT's CEO, will provide responses to questions through a live
video webcast which can be accessed by any interested party worldwide by
visiting the website listed below.

The format for the live webcast will be as follows:

  * Investors are invited to email questions prior to the event to 
    [e-mail]. These questions will help form the presentation
    given by Simon Tucker on the webcast. Questions must be submitted before 6:
    00 p.m. on Wednesday 20 April.
   
  * Investors who wish to participate in the webcast should visit 
    www.softwarerad.com/investorwebcast immediately prior to the webcast, and
    login using a nickname and their email address. Please note that investor
    names and identities will not be broadcast and will be kept strictly
    confidential.
   
  * During the webcast, investors will be able to send instant messages from
    the viewing website to Simon for him to answer and react to live.
   
  * A recording of the webcast will be posted on the SRT website within one
    hour of the live event ending.
   
                                    -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.