SOURCE: Spirent Communications PLC

August 30, 2006 11:48 ET

Spirent Communications PLC announces Transaction in Own Shares

Crawley, UK -- (MARKET WIRE) -- August 30, 2006 --

Spirent Communications plc announces that on 30 August 2006 it purchased from JPMorgan Cazenove Limited 2,000,000 Spirent Communications plc ordinary shares at an average price of 46.5727 pence per share. The purchased shares will be held as treasury shares. Following the above purchase, Spirent Communications plc holds 50,990,000 Spirent Communications plc ordinary shares in treasury, and has 920,944,304 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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