SOURCE: Spirent Communications PLC

August 29, 2006 12:35 ET

Spirent Communications PLC announce Transaction in Own Shares

Crawley, UK -- (MARKET WIRE) -- August 29, 2006 --

Spirent Communications plc announces that on 29 August 2006 it purchased from JPMorgan Cazenove Limited 1,000,000 Spirent Communications plc ordinary shares at an average price of 46.4678 pence per share. The purchased shares will be held as treasury shares. Following the above purchase, Spirent Communications plc holds 48,990,000 Spirent Communications plc ordinary shares in treasury, and has 922,943,953 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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