Additional Listing

Spirent Communications PLC
18 January 2007



Application has been made to The UK Listing Authority and The London Stock
Exchange for a block listing of 3,300,000 Ordinary shares of 3 1/3p each under
the Employee Incentive Plan 2005, to trade on the London Stock Exchange and to
be admitted to the Official List upon issuance. The shares shall rank equally
with the existing issued shares of the Company.




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