SOURCE: Spirent Communications PLC

November 10, 2006 12:29 ET

Spirent Communications PLC announce - Transaction in Own Shares

Crawley, UK -- (MARKET WIRE) -- November 10, 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 350,000 ordinary shares at an average price of 59.70 pence per share. The highest price and the lowest price paid for these shares were 60.0 pence and 59.25 pence respectively.

Following the above purchase, Spirent Communications plc holds 87,851,487 Spirent Communications plc ordinary shares in treasury, and has 887,355,507 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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