Holding(s) in Company

TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached (ii):

Software Radio Technology plc

2. Reason for the notification (please state Yes/No): ( )

An acquisition or disposal of voting rights: (NO)

An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached: (NO)

An event changing the breakdown of voting rights: (NO)

Other (please specify): (YES)

3. Full name of person(s) subject to the notification obligation (iii):

UBS Investment Bank

4. Full name of shareholder(s) (if different from 3.) (iv):

N/A

5. Date of the transaction (and date on which the threshold is crossed or 
reached if different) (v):

7 March 2007 (see 13 - additional information)

6. Date on which issuer notified:

8 March 2007

7. Threshold(s) that is/are crossed or reached:

3%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares  Situation of previous to the Triggering transaction (vi) 
if possible using                                                              
ISIN code                   Number of shares         Number of voting Rights   
                                                              (viii)           
                                                                               
GB00B0M8KM36                   3,170,934                    3,170,934          

Resulting situation after the triggering transaction (vii)

Class/type of         Number of    Number of voting rights   % of voting rights 
shares if possible     shares                (ix)                               
using the ISIN                                                                  
CODE                   Direct        Direct (x)   Indirect    Direct    Indirect
                                                    (xi)                        
                                                                                
GB00B0M8KM36       Non-notifiable  Non-notifiable            Below 3%           

B: Financial Instruments

Resulting situation after the triggering transaction (xii)

Type of     Expiration  Exercise/          Number of voting      % of voting   
financial   Date (xiii) Conversion Period/ rights that may be    rights        
instrument              Date (xiv)         acquired if the                     
                                           instrument is                       
                                           exercised/ converted.               
                                                                               
    N/A         N/A            N/A                  N/A               N/A      

Total (A + B)

 Number of Voting Rights       % of voting rights    
                                                     
      Non-notifiable                Below 3%         

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable (xv):

N/A

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will cease to hold:

N/A

12. Date on which proxy holder will cease to hold voting rights:

N/A

13. Additional information:

This disclosure has been made to fulfil the FSA requirement:

The Transparency Directive states that where a major shareholder has not been
required (because of an acquisition or disposal of voting rights or due to a
change in the total voting rights in issue) to make an announcement to the
issuer prior to 20 March 2007, then we must do so by that date in any event.

Please note that UBS are no longer required to include prime brokerage holdings
in the disclosures under DTR5.

14. Contact name:

Angela Huff, Associate Director

15. Contact telephone number:

[phone]


Software Radio Technology plc                                     01761 409 500
Matthew Rogers                                                                 


Hanson Westhouse Limited                                          0113 246 2610
Tim Feather / Matthew Johnson