Director Shareholding

Spirent PLC
08 January 2003

London Stock Exchange


              NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED

                                    PERSONS



All relevant boxes should be completed in typed block capital letters.

1    Name of company                                             2    Name of director

     SPIRENT plc                                                      MY E CHUNG

3    Please state whether notification indicates that it is in   4    Name of the registered holder(s) and, if more
     respect of holding of the director named in 2 above or           than one holder, the number of shares held by
     holding of that person's spouse or children under the age        each of them. (If notified)
     of 18 or in respect of a non-beneficial interest

     In respect of the Director's Holding

                                                                      BANK OF NEW YORK (SEE ADDITIONAL INFORMATION)

5    Please state whether notification relates to a person(s)    6    Please state the nature of the transaction. For
     connected with the director named in 2 above and identify        PEP transactions please indicate whether
     the connected person(s)                                          general/single company PEP and if discretionary
                                                                      /non discretionary.
     N/A
                                                                      EXERCISE OF PURCHASE RIGHTS UNDER THE SPIRENT
                                                                      EMPLOYEE STOCK PURCHASE PLAN


7    Number of shares 8   Percentage of     9   Number of shares 10   Percentage of Issued
     /amount of stock     issued                /amount of stock
     acquired                                   disposed              Class
                          Class
     22,400 SHARES                              NIL                   N/A
                          0.00238%

11   Class of         12  Price per share   13  Date of          14   Date company informed
     security                                   transaction
                          14.25 PENCE                                 08 JAN 2003
     Ordinary shares                            02 JAN 2003
     of 3 1/3p each
     (SEE ADDITIONAL
     INFORMATION)

15   Total holding following this notification                   16   Total percentage holding of issued class
                                                                      following this notification

     70,997 SHARES IN TOTAL, OF WHICH 31,377 ARE BENEFICIALLY         0.00753%
     HELD AS ADRs AND 39,620 NON-BENEFICIALLY HELD UNDER THE
     COMPANY'S ANNUAL BONUS INCENTIVE PLAN



If a director has been granted options by the company please complete the
following boxes.

17   Date of grant                                         18   Period during which or date on which exercisable

     02 JAN 2003                                                02 JAN 2004

19   Total amount paid (if any) for grant of the option    20   Description of shares or debentures involved: class,
                                                                number
     NIL
                                                                17,653 ORDINARY SHARES OF 3 1/3 PENCE

                                                                The exercise price and number of purchase rights under
                                                                the PLAN cannot be determined until maturity (i.e. 12
                                                                months following the date of grant). 17,653 relates to
                                                                the number of shares subject to purchase rights based
                                                                on the market price of a Spirent Ordinary share (less
                                                                an applicable 15 per cent discount) as at the date of
                                                                grant.

                                                                (SEE ADDITIONAL INFORMATION)

21   Exercise price (if fixed at time of grant) or         22   Total number of shares or debentures over which options
     indication that price is to be fixed at time of            held following this notification
     exercise
                                                                1,906,609 OPTIONS OVER ORDINARY SHARES OF 3 1/3P PENCE
     IN ACCORDANCE WITH THE RULES OF THE EMPLOYEE STOCK
     PURCHASE PLAN, THE FINAL EXERCISE PRICE CANNOT BE
     DETERMINED UNTIL MATURITY, WHICH IN NORMAL
     CIRCUMSTANCES IS 12 MONTHS FROM THE DATE OF GRANT.
     THE PURCHASE PRICE IS SET AT A 15% DISCOUNT TO THE
     MARKET PRICE OF A SPIRENT ORDINARY SHARE ON EITHER
     THE FIRST OR LAST DAY OF THE OFFERING PERIOD -
     WHICHEVER PRICE IS THE LOWER. THE DISCOUNTED PRICE ON
     THE FIRST DAY OF THE OFFERING PERIOD WAS 14.25 PENCE.
     (SEE ADDITIONAL INFORMATION)

23   Any additional information                            24   Name of contact and telephone number for queries

     THE EMPLOYEE STOCK PURCHASE PLAN IS AN ALL EMPLOYEE        LUKE THOMAS- 01293 767658
     SHARE PLAN UNDER WHICH ELIGIBLE USA EMPLOYEES
     PARTICIPATE ON A SIMILAR BASIS TO THE UK SAVINGS
     RELATED SHARE OPTION SCHEME. ALL OUSTANDING PURCHASE
     RIGHTS UNDER THE PLAN ARE EXERCISED AUTOMATICALLY
     UPON MATURITY OF THE OFFERING PERIOD. PURSUANT TO THE
     OPERATION OF THE PLAN, THE 22,400 ORDINARY SHARES
     WERE DELIVERED AS AMERICAN DEPOSITORY RECEIPTS (ADRs)
     TO THE BANK OF NEW YORK, WHO ARE THE APPOINTED
     ADMINISTRATORS OF THE PLAN.

25   Name and signature of authorised company official

     Responsible for making this notification                   Luke Thomas

     Date of notification .8 JAN 2003                           - Deputy Company Secretary


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

Facsimile: 020 7588 6057, 020 7334 8964/8965/8966 (PLEASE DO NOT POST)

Enquiries: Continuing obligations: Telephone: [phone]



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