Director Shareholding

Spirent PLC
18 January 2002


DOCUMENT DATED:  17 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
                 
                   5,430 @         0.8321
                  79,706 @         1.0856
                  19,021 @         0.9361
                   5,128 @         0.7602
                   1,333 @         1.0647
                 110,618

Following this disposal the total number of shares held by the Trust is 
4,143,445 shares (representing 0.44397% 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.