Director Shareholding

Spirent PLC
06 January 2004




London Stock Exchange
Company Announcements Office
Old Broad Street
EC2N 1HP


5 January 2004


Dear Sir / Madam


SPIRENT plc - Stock Exchange Ticker Symbol 'SPT'


Notification of Director's Interests


Spirent plc Long Term Share Purchase Plan ('LTSPP')



As at 31 December 2003 the minimum performance conditions attached to the
remaining awards of Performance Units under the LTSPP have not been met and
therefore these awards lapsed without value.


Following the lapse of the last remaining awards under the LTSPP, the Directors
(as listed below) no longer have any interests in Performance Units granted
under the LTSPP.



Director           LTSPP Performance  Date of grant    Price per Performance   LTSPP Performance
                   Units lapsed                        Unit at date of grant   Units outstanding
N K Brookes        123,000            9 April 2001     304 pence               Nil
E G Hutchinson     62,000             9 April 2001     304 pence               Nil
M E Chung          50,000             9 April 2001     304 pence               Nil



Yours faithfully

Warren Nash
Company Secretarial Assistant

01293 767657


                      This information is provided by RNS
            The company news service from the London Stock Exchange