Director Shareholding

Spirent PLC
6 November 2001


                                                         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 CHUNG

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

   DIRECTOR NAMED IN 2 ABOVE                         NOT NOTIFIED

5  Please state whether notification relates      6  Please state the nature of
   to a person(s) connected with the director        the transaction. For
   named in 2 above and identify                     PEP transactions please
                                                     indicate whether
   The connected person(s)                           general/single co PEP and
                                                     if discretionary/non
   N/A                                               discretionary.

                                                     Exercise of Purchase
                                                     Rights pursuant to the
                                                     rules of the Company's
                                                     U.S. Stock Purchase Plan.

7  Number of      8  Percentage 9  Number of      10 Percentage of
   shares/amount     of issued     shares/amount     Issued
   of stock          Class         of stock
   acquired                        disposed          Class

   8,113               0.0008      -                        -

11 Class of       12 Price per  13 Date of        14 Date company
   security          share         transaction       informed

   Ordinary 3 1/3    102 pence     1 November 2001   5 November 2001
   pence                           

15 Total holding following this notification      16 Total percentage holding
                                                     of issued class following
                                                     this notification
   47,733 shares in total, of which 8,113 shares
   are beneficially held and 39,620 shares are             0.005%
   held non-beneficially pursuant to the terms of
   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


19 Total amount paid (if any) for      20 Description of shares or debentures
   grant of the option                    involved: class,

   None                                   Number

21 Exercise price (if fixed at time of 22 Total number of shares or
   grant) or indication that              debentures over which options
   Price is to be fixed at time of        held following this notification
   exercise

23 Any additional information          24

   The non-beneficial holding of
   39,620 shares referred to above is
   registered under Orbis Pension
   Trustees Limited T1019 (the
   'Trustee'), the Trustee of
   Spirent's employee benefit trust
   established to deliver Spirent
   Ordinary shares under various
   discretionary employee share
   schemes and under the Annual Bonus
   Incentive Plan. As a result of
   this, Mr Chung is a potential
   beneficiary of the shares held by
   the aforementioned Trustee.
   Consequently Mr Chung has a deemed
   interest in 9,064,985 Ordinary
   Shares, being the total number of
   Ordinary shares held by the
   Trustee.

25 Name and signature of authorised
   company official
   Responsible for making this
   notification                           
                                          
   Date of notification ..6 November 2001  JO GOMM - ASSISTANT COMPANY SECRETARY