Transaction in Own Shares

Spirent Communications PLC
08 June 2006





Spirent Communications plc announces that on 8 June 2006 it purchased from
JPMorgan Cazenove Limited 500,000 Spirent Communications plc ordinary shares at
an average price of 44.6627 pence per share. The purchased shares will be held
as treasury shares. Following the above purchase, Spirent Communications plc
holds 6,890,000 Spirent Communications plc ordinary shares in treasury, and has
963,719,008 Spirent Communications plc ordinary shares in issue (excluding
treasury shares).




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