Transaction in Own Shares

Spirent Communications PLC
03 July 2006





Spirent Communications plc announces that on 3 July 2006 it purchased from
JPMorgan Cazenove Limited 1,000,000 Spirent Communications plc ordinary shares
at an average price of 37.7493 pence per share. The purchased shares will be
held as treasury shares. Following the above purchase, Spirent Communications
plc holds 21,140,000 Spirent Communications plc ordinary shares in treasury, and
has 949,670,133 Spirent Communications plc ordinary shares in issue (excluding
treasury shares).




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