SOURCE: Spirent Communications PLC

July 11, 2006 12:10 ET

Spirent Communications PLC announces: Transaction in Own Shares

Crawley, UK -- (MARKET WIRE) -- July 11, 2006 --

Spirent Communications plc announces that on 11 July 2006 it purchased from JPMorgan Cazenove Limited 1,000,000 Spirent Communications plc ordinary shares at an average price of 35.1631 pence per share. The purchased shares will be held as treasury shares. Following the above purchase, Spirent Communications plc holds 26,640,000 Spirent Communications plc ordinary shares in treasury, and has 944,205,758 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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