AIS Class B FCC Approval

SOFTWARE RADIO TECHNOLOGY PLC                         

                          AIS CLASS B US FCC APPROVAL                          

The Directors of Software Radio Technology plc ("SRT" or the "Company") are
pleased to announce that SRT's AIS Class B transceiver has received approval
from the US Federal Communications Commission (the "FCC").

SRT launched its range of low cost AIS Class B products and obtained EU
approval at the end of 2006. Having obtained US Coast Guard approval in
February, FCC approval was the final step to enable the Company's transceivers
and technology to be sold into the key US market.

SRT's solution is the only FCC and USCG approved AIS Class B technology in the
world. The Company is working with a growing customer base of over 20 companies
around the world which are seeking to sell AIS products based on SRT
technology.

The US Homeland Security, Maritime Domain Awareness programme places AIS at its
core with significant investment in infrastructure to support the use of AIS
technology on vessels of all sizes. The US market is the world's largest marine
market with over 12 million vessels.

Simon Tucker, SRT's Managing Director, said, "This is excellent news for our
marine division and the timing is well ahead of expectations. Without FCC and
USCG approval, our customers have been unable to leverage their US sales and
distribution channels. As of today they can and with a potential market of 12
million vessels in the US, the potential is substantial."

Enquiries:                                                                     
                                                                               
Software Radio Technology plc                                      01761 409500
                                                                               
Simon Tucker                                       [e-mail]
                                                                               
Managing Director                                                              
                                                                               
Hanson Westhouse Limited                                          0113 246 2610
                                                                               
Tim Feather                                                                    
                                                                               
CityRoad Communications                                           020 7248 8010
                                                                               
Paul Quade                                                         07947 186694

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.