Srt Marine Sys. Regulatory News (SRT)

11 Apr 2007 11:31

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

Software Radio Technology plc

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

An acquisition or disposal of voting rights: (YES)

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)

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

Gartmore Investment Limited

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

See annex

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

3 April 2007

6. Date on which issuer notified:

11 April 2007

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

16%8. Notified details:

A: Voting rights attached to shares

Class/type Situation of previous Resulting Situation after the triggering of shares if to the Triggering

transaction possible transaction using ISIN code Number of Number of Number of Number of voting % of voting shares voting shares rights rights rights Direct Indirect Direct Indirect

GB00B0M8KM36 12,047,604 12,047,604 13,766,951 13,766,951 16.115

B: Financial Instruments

Resulting Situation after the triggering transaction

Type of Expiration Exercise / Number of Voting rights that may % of

Financial Date Conversion be acquired if the instrument is voting Instrument Period /Date exercised / converted rights Total (A + B)

Number of Voting Rights % of voting rights

13,766,951 16.115

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

N/AProxy 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/A13. Additional information:

All shares are held indirectly

All figures are based on the Company's issued share capital of 85,429,939

14. Contact name:Alison Averono15. Contact telephone number:020 7782 2324

Annex Notification of Major Interests in Shares:

Fund No. of Per UK registered Beneficial owner managing shares cent. owner company held GFM 4,054,330 4.746% HSBC Global Gartmore Fund Managers Ltd A/c Custody Nominee Gartmore UK & Irish Smaller UK Ltd Companies SUBTOTAL 4,054,330 4.746% GIL 1,397,082 1.635% Goldman Sachs The Gartmore UK Small Cap Best Nominees Ltd Ideas Fund Ltd GIL 1,659,073 1.942% BNY GIL CLT A/c Gartmore Smaller Companies Trust Noms Ltd A/c LST PLC GIL 418,246 0.490% BNY GIL CLT A/c Gartmore Growth Opportunities PLC Noms Ltd A/c NWSC GIL 3,843,199 4.499% Vidacos Nominees The Alphagen Volantis Fund Limited Ltd A/c 2303 GIL 2,395,021 2.803% Nortrust Nominees Strathclyde Pension Fund Ltd SUBTOTAL 9,712,621 11.369% TOTAL 13,766,951 16.115%

"GFM" Gartmore Fund Managers Limited

"GIL" Gartmore Investment Limited

Software Radio Technology 01761 409 500 Matthew Rogers Hanson Westhouse Limited 0113 246 2610Tim Feather / Matthew Johnson