Additional Listing

Spirent PLC
23 August 2002




Spirent plc.


In connection with the acquisition of Caw Networks, Inc. a further 115,394
Spirent Ordinary shares of 3 1/3p have been issued as part of the initial
consideration. Accordingly, application has been made to The UK Listing
Authority for these shares to be admitted to the Official List and to the London
Stock Exchange for these shares to be admitted to trading. The Shares rank pari
passu with the existing issued shares of the Company. Dealings are expected to
commence on 28 August 2002.

Copies of this announcement are available from the office of Cazenove & Co. Ltd
for the period of 2 business days from the date hereof.


END.

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