SOURCE: Spirent Communications PLC

July 10, 2006 12:26 ET

Spirent Communications PLC announces -- Transaction in Own Shares

Crawley, UK -- (MARKET WIRE) -- July 10, 2006 --

Spirent Communications plc announces that on 10 July 2006 it purchased from JPMorgan Cazenove Limited 1,000,000 Spirent Communications plc ordinary shares at an average price of 36.4115 pence per share. The purchased shares will be held as treasury shares. Following the above purchase, Spirent Communications plc holds 25,640,000 Spirent Communications plc ordinary shares in treasury, and has 945,205,758 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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