Director Shareholding

Spirent PLC
27 February 2003



London Stock Exchange

Company Announcements Office

Old Broad Street

LONDON

EC2N 1HP




27 February 2003




Dear Sir / Madam

SPIRENT plc - Stock Exchange Ticker Symbol SPT

Notification of Directors' Interests

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

On 11 May 2000 the directors listed below were granted Performance Units at a
unit value of

334 pence each under the LTSPP (the 'Award').


At a meeting of the Remuneration Committee of the Board on 26 February 2003 it
was determined that as the minimum performance conditions attaching to the first
three-year performance period of the Award were not satisfied on 31 December
2002, no value therefore arises and, pursuant to the rules of the LTSPP, the
Performance Units have lapsed.


The directors no longer have an interest in the Performance Units granted on 11
May 2000 and following this notification their remaining interests in the LTSPP
Performance Units are as set out below.


Director           LTSPP Performance Units granted 11     LTSPP Performance Units remaining
                   May 2000 now lapsed                    (granted 9 April 2001)

N K Brookes        85,480                                 123,000
E G Hutchinson     28,849                                 62,000
M E Chung          38,893                                 50,000



Yours faithfully

Luke Thomas

Luke Thomas

Deputy Company Secretary






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