Director Shareholding

Spirent PLC
19 February 2001


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 (£)

                     1,875 @                  0.7602
                     1,314 @                  0.8890
                    10,037 @                  1.0647
                     2,336 @                  1.1668
                       301 @                  1.4210
                       766 @                  1.5987
                   
                    16,629

Following this disposal the total number of shares held by the Trust is
4,768,646 shares (representing 0.515% 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.


Contact:

Michael Arnaouti
(Tel [phone])