TETRA Technology Agreements

SOFTWARE RADIO TECHNOLOGY PLC                         

                      TETRA TECHNOLOGY SUPPLY AGREEMENTS                       

The Directors of Software Radio Technology plc ("SRT" or the "Company") are
pleased to announce that SRT has entered into agreements with Teltronic, S.A.U.
("Teltronic") of Spain and Selex Communications S.p.A. ("Selex") of Italy for
the supply of TETRA handset technology in the form of its RF ASIC. The initial
agreements are worth a minimum of US$1.2 million over the next 16 months with
further upside as handset sales increase.

Teltronic is the only Spanish manufacturer of TETRA and other PMR (Professional
Mobile Radio) systems. The company manufactures and supplies TETRA equipment
worldwide through an international network of distributors and SRT's technology
is an integral element of this equipment.

Selex is a wholly owned subsidiary of Finmeccanica Group and is based in
Florence, Italy. The company is the only Italian manufacturer of TETRA systems
and last year was informally awarded the contract to supply the Italian
national TETRA system and is now awaiting the formal contract. In addition,
Selex supplies its equipment worldwide. Again SRT's technology is an integral
element of this equipment.

Simon Tucker, SRT's Managing Director said, "Selex and Teletronic have been
TETRA customers of SRT for some time. These new agreements demonstrate the
growth in the TETRA market and the value SRT's evolving digital PMR technology
provides to these multinational companies. Both customers have exceptional
opportunities within Europe and elsewhere and we will continue to work with
them to ensure their success and that SRT technology remains at the core of
their TETRA equipment."

Enquiries:                                                                     
                                                                               
Software Radio Technology plc                                      01761 409500
                                                                               
Simon Tucker                                                                   
                                                                               
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 Selex:

Selex is a wholly owned subsidiary of Finmeccanica based in Italy. The company
specialises in the supply of sophisticated digital communication solutions to a
variety of customers around the world. www.selex-comms.com

About Teltronic:

Teltronic is based in Spain and specialises in the supply of sophisticated
digital communication solutions to a variety of customers around the world. 
www.teltronic.es