US COAST GUARD APPROVAL

SOFTWARE RADIO TECHNOLOGY PLC                         

                      AIS CLASS B US COAST GUARD APPROVAL                      

The Directors of Software Radio Technology plc ("SRT" or the "Company") are
pleased to announce that SRT has received US Coast Guard ("USCG") approval for
its AIS Class B transceiver.

At the end of 2006, SRT launched the world's first low cost, AIS standard
compliant AIS Class B transceiver designed for use by small commercial and
leisure boats. AIS enables accurate and reliable identification and tracking of
maritime traffic and is now an integral element of many countries' homeland
security strategies.

SRT is working with a growing customer base of over 20 companies around the
world to launch a range of AIS Class B products during 2007.

Simon Tucker, SRT's Managing Director said; "SRT has achieved a world first by
obtaining USCG approval for our Class B solution. The USCG is a supporter of
AIS and we believe this paves the way for the wider rollout of AIS. With over
12 million boats in the US alone, this is clearly a very exciting prospect for
us."

Enquiries:                                                                     
                                                                               
Software Radio Technology plc                                      01761 409500
                                                                               
Simon Tucker                                       [e-mail]
                                                                               
Managing Director                                                              
                                                                               
Hanson Westhouse Limited                                          0113 246 2610
                                                                               
Tim Feather                                                                    

About SRT:

Founded in 1987 and quoted on AIM in 2005, SRT focuses on the development of
turnkey technology product solutions for homeland security applications. SRT's
technologies are used by manufacturers to fast track and de-risk the
development of their own products. SRT has focused on the areas of professional
voice and data radio communications such as TETRA and maritime identification
and tracking systems, such as AIS: both of which are global standards. The
company has a worldwide customer base with a business model based on customers
paying royalties on each product manufactured.

About US Coast Guard:

The USCG is a division of the US Department of Homeland Security. The USCG is
responsible for the safety and security of the entire coastline and inland
waterways of the United States. www.uscg.mil