SOURCE: Spirent Communications PLC

June 23, 2006 12:36 ET

Spirent Communications PLC - Transaction in Own Shares

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

Spirent Communications plc announces that on 23 June 2006 it purchased from JPMorgan Cazenove Limited 1,000,000 Spirent Communications plc ordinary shares at an average price of 39.5537 pence per share. The purchased shares will be held as treasury shares. Following the above purchase, Spirent Communications plc holds 17,440,000 Spirent Communications plc ordinary shares in treasury, and has 953,355,507 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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