Director Shareholding

Spirent PLC
10 April 2001


    Michael Arnaouti

    Company Secretary


    10 April 2001


    London Stock Exchange

    Company Announcements Office

    Old Broad Street

    London EC2N 1HP



    Dear Sir / Madam

    SPIRENT plc - STOCK EXCHANGE TICKER SYMBOL SPT

    NOTIFICATION OF INTERESTS IN DIRECTORS AND CONNECTED PERSONS -

    ERIC GEORGE HUTCHINSON

    Spirent plc (the 'Company') announces that 62,000 Performance Units at 305
    pence per Unit were granted on 9 April 2001 to Eric George Hutchinson (the
    'Participant') under the terms of the Company's Long Term Share Purchase
    Plan ('LTSPP') (the 'Grant'). A Performance Unit is equivalent to one
    Ordinary share of the Company.

    The Participant is not required to pay any consideration in respect of the
    Grant and his aggregate number of Performance Units held following the
    above award, stands at 90,849.

    Subject to and in accordance with the rules and the operation of the
    LTSPP, the first performance period in respect of the grant will be the
    three years starting from 1 January 2001. The second performance period in
    respect of the Grant will be the three years starting from 1 January 2004.
    Performance conditions apply to both performance periods.

    In respect of the first performance period, the value of the reward will
    be based on the increase in value of the Performance Units between the
    date of Grant and the third anniversary of the Grant. In respect of the
    second performance period, the value of the Grant cannot be determined
    since the Participant has an entitlement to make an election to take any
    reward value in the form of either Company shares and/or cash.

    Yours faithfully



    Michael Arnaouti

    Group Company Secretary

                                                         London Stock Exchange

             NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED

                                   PERSONS
AVS No

All relevant boxes should be completed in typed block capital letters.
1     Name of company                             2     Name of director

      SPIRENT plc                                       ERIC GEORGE HUTCHINSON

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

      of 18 or in respect of a non-beneficial
      interest
                                                        NOT NOTIFIED
      IN RESPECT OF THE DIRECTOR'S HOLDING

5     Please state whether notification relates   6     Please state the nature
      to a person(s) connected with the director        of the transaction. For
      named in 2 above and identify
                                                        PEP transactions please
      The connected person(s)                           indicate whether

      N/A                                               general/single co PEP
                                                        and if discretionary/
                                                        non

                                                        discretionary.

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



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



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


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
      9 April 2001
                                             9 April 2004 - 8 April 2011

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

                                             Number

                                             OPTIONS OVER 105,000 ORDINARY
                                             SHARES OF 31/3 p

21    Exercise price (if fixed at time 22    Total number of shares or
      of grant) or indication that           debentures over which options

      Price is to be fixed at time of        held following this notification
      exercise
                                             380,932
      305 pence

23    Any additional information       24    Name of contact and telephone
                                             number for queries
      Options awarded under the
      Company's Executive Share Option       Jo Gomm - 01293 767656
      Scheme

25    Name and signature of authorised
      company official

      Responsible for making this
      notification                           MICHAEL ARNAOUTI - GROUP COMPANY
                                             SECRETARY
      Date of notification 10 April
      2001

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)

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