Director Declaration

Spirent PLC 17 December 2004 Regulatory News Service 17 December 2004 Dear Sirs SPIRENT PLC - APPOINTMENT OF DIRECTOR Following the appointment of Mr Kurt Hellstrom as a non-executive director of Spirent plc with effect from 9 December 2004, the following information is disclosed pursuant to Chapter 16.4 of the Listing Rules: Directorships held of public quoted companies in the previous five years: Atlas Copco AB 1999 to present Bharti Televentures Limited 2004 to present Gemplus International SA 2004 to present Telefonaktiebolaget LM Ericsson Until 2003 There are no other such details that need to be disclosed pursuant to Chapter 16.4 of the Listing Rules. Yours faithfully Luke Thomas Deputy Company Secretary Spirent plc Tel: (44) (0) 1293 767676 This information is provided by RNS The company news service from the London Stock Exchange UARA
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