Transaction in Own Shares

Spirent Communications PLC
08 November 2006

Spirent Communications Plc

Transaction in Own Shares



Spirent Communications PLC announces that it has today purchased through
Citigroup Global Markets U.K. Equity Limited 600,000 ordinary shares at an
average price of 59.693 pence per share. The highest price and the lowest price
paid for these shares were 60.0 pence and 59.0 pence respectively.



Following the above purchase, Spirent Communications plc holds 86,901,487
Spirent Communications plc ordinary shares in treasury, and has 887,770,250
Spirent Communications plc ordinary shares in issue (excluding treasury shares).





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