Additional Listing

Spirent PLC
30 November 2004




Application has been made to The UK Listing Authority and the London Stock
Exchange for block listings totalling 2,500,000 Ordinary shares of 3 1/3p each
to trade on the London Stock Exchange and to be admitted to the Official List
upon issuance. The shares shall rank pari passu with the existing issued shares
of the Company.



The Block listings consist of 1,800,000 shares to be issued under The Spirent
Employee Stock Purchase Plan and 700,000 shares to be issued under The Spirent
Global All Employee Share Purchase Plan.




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