Director Shareholding

Spirent PLC
23 January 2002

Dated 22 January 2002


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

                 29,644 @            1.0856
                 16,954 @            0.9361
                  4,615 @            0.7602
                  4,266 @            0.8321
                    403 @            1.5987

                 55,882

Following this disposal the total number of shares held by the Trust is
4,087,563 shares (representing 0.43799% 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.


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