SOURCE: Spirent Communications PLC

June 21, 2006 12:56 ET

Spirent Communications PLC announces Transaction in Own Shares

Crawley, UK -- (MARKET WIRE) -- June 21, 2006 --

Spirent Communications plc announces that on 21 June 2006 it purchased from JPMorgan Cazenove Limited 900,000 Spirent Communications plc ordinary shares at an average price of 38.4186 pence per share. The purchased shares will be held as treasury shares. Following the above purchase, Spirent Communications plc holds 15,440,000 Spirent Communications plc ordinary shares in treasury, and has 955,355,507 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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