Director Shareholding

Spirent PLC 4 April 2001 London Stock Exchange Company Announcements Office Old Broad Street London EC2N 1HP (020 7588 6057) 4 April 2001 Dear Sirs Spirent plc - NOTIFICATION OF DEEMED INTERESTS BY DIRECTORS Spirent QUEST Limited, the trustee and registered shareholder for the Spirent Employee Benefit Trust, has today disposed of the following Ordinary shares in Spirent to satisfy the exercise of options under the Company's SAYE Share Option Scheme: No of Shares Option Price (£) 1,670 @ 1.1668 1,670 Following this disposal the total number of shares held by the Trust is 4,719,745 shares (representing 0.509 % of the issued share capital). Nicholas Brookes and Eric Hutchinson, both Directors, are potential beneficiaries of the Trust (together with all other employee share option holders) and are therefore treated under the Companies Act 1985 as having a deemed interest in the total number of shares held by the Trust. As a result, the Directors' deemed interests in the Trust have been reduced by the above number of shares disposed of. For the avoidance of doubt, the Company confirms that this notification does not relate to an actual dealing in securities by the said Directors whose beneficial interests in the Company remain unchanged notwithstanding the above events. If you have any queries, please do not hesitate to contact the writer (Tel 01293 767676). Yours faithfully, Michael Arnaouti Company Secretary
UK 100

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