SOURCE: Spirent Communications PLC

August 23, 2006 12:15 ET

Spirent Communications Plc announces Transaction in Own Shares

Crawley, UK -- (MARKET WIRE) -- August 23, 2006 --

Spirent Communications plc announces that on 23 August 2006 it purchased from JPMorgan Cazenove Limited 1,000,000 Spirent Communications plc ordinary shares at an average price of 46.3575 pence per share. The purchased shares will be held as treasury shares. Following the above purchase, Spirent Communications plc holds 45,990,000 Spirent Communications plc ordinary shares in treasury, and has 925,693,953 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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