Director Shareholding

Spirent PLC
11 January 2001



                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

SPIRENT plc


2)  NAME OF DIRECTOR

ERIC GEORGE HUTCHINSON


3)  Please state whether notification indicates that it is in respect of
    holding of the shareholder named in 2 above or in respect of a
    non-beneficial interest or in the case of an individual holder
    if it is a holding of that person's spouse or children under the
    age of 18 or in respect of an non-beneficial interest

HOLDING BY EMPLOYEE BENEFIT TRUST OF WHICH DIRECTORS ARE BENEFICIARIES

4)  Name of the registered holder(s) and, if more than one holder, the
    number of shares held by each of them. (If notified)

SPIRENT QUEST LIMITED



5)  Please state whether notification relates to a person(s) connected
    with the Director named in 2 above and identify the connected person(s)

N/A


6)  Please state the nature of the transaction. For PEP transactions
    please indicate whether general/single co PEP and if discretionary/non
    discretionary

THE DIRECTOR, IN 2 ABOVE, TOGETHER WITH ALL OTHER EMPLOYEE OPTION HOLDERS, IS A
POTENTIAL BENEFICIARY OF THE EMPLOYEE BENEFIT TRUST TO THE EXTENT OF HIS
INDIVIDUAL SAYE SHARE OPTION HOLDING AND IS THEREFORE TREATED AS NO LONGER
INTERESTED IN THE SHARES DISPOSED OF BY Spirent QUEST limited.


7)  Number of shares/amount of
    stock acquired

-

8)   ( - %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

27,639


10)  ( 0.00298 %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3p EACH


12) Price per share

4,673 @  76.02p
7,452 @  88.90p
8,096 @ 106.47p
4,587 @ 108.56p
2,831 @ 116.68p


13) Date of transaction

10 JANUARY 2001


14) Date company informed

10 JANUARY 2001


15) Total holding following this notification

    38,911  PERSONAL
 4,820,409  HOLDING IN QUEST (see box 6)
 9,025,719  HOLDING IN LTSPP (see box 23)
13,885,039


16) Total percentage holding of issued class following this notification

1.499%


     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 grant of the option



20) Description of shares or debentures involved: class, number.



21) Exercise price (if fixed at time of grant) or indication that price
    is to be fixed at time of exercise



22) Total number of shares or debentures over which options held
    following this notification



23) Any additional information

The DIRECTOR IN 2 ABOVE, TOGETHER WITH ALL OTHER EMPLOYEES, IS A POTENTIAL
BENEFICIARY OF THE EMPLOYEE BENEFIT TRUSTS ESTABLISHED IN RESPECT OF THE
LTSPP TO PROVIDE SPIRENT ORDINARY SHARES UNDER A LONG TERM SHARE PURCHASE
PLAN.

THIS IS NOT A DEALING BY A DIRECTOR.


24) Name of contact and telephone number for queries

LUKE THOMAS - 01293 767676


25) Name and signature of authorised company official responsible for
    making this notification

   Date of Notification    11 JANUARY 2001
                             



                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

SPIRENT plc


2)  NAME OF DIRECTOR

NICHOLAS KELVIN BROOKES

3)  Please state whether notification indicates that it is in respect of
    holding of the shareholder named in 2 above or in respect of a
    non-beneficial interest or in the case of an individual holder
    if it is a holding of that person's spouse or children under the
    age of 18 or in respect of an non-beneficial interest

HOLDING BY EMPLOYEE BENEFIT TRUST OF WHICH DIRECTORS ARE BENEFICIARIES

4)  Name of the registered holder(s) and, if more than one holder, the
    number of shares held by each of them. (If notified)

SPIRENT QUEST LIMITED



5)  Please state whether notification relates to a person(s) connected
    with the Director named in 2 above and identify the connected person(s)

N/A


6)  Please state the nature of the transaction. For PEP transactions
    please indicate whether general/single co PEP and if discretionary/non
    discretionary

THE DIRECTOR, IN 2 ABOVE, TOGETHER WITH ALL OTHER EMPLOYEE OPTION HOLDERS, IS A
POTENTIAL BENEFICIARY OF THE EMPLOYEE BENEFIT TRUST TO THE EXTENT OF HIS
INDIVIDUAL SAYE SHARE OPTION HOLDING AND IS THEREFORE TREATED AS NO LONGER
INTERESTED IN THE SHARES DISPOSED OF BY Spirent QUEST limited.



7)  Number of shares/amount of
    stock acquired

-

8)   ( - %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

27,639


10)  ( 0.00298 %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3p EACH


12) Price per share

4,673 @  76.02p
7,452 @  88.90p
8,096 @ 106.47p
4,587 @ 108.56p
2,831 @ 116.68p


13) Date of transaction

10 JANUARY 2001


14) Date company informed

10 JANUARY 2001


15) Total holding following this notification

   104,584  PERSONAL
 4,820,409  HOLDING IN QUEST (see box 6)
 9,025,719  HOLDING IN LTSPP (see box 23)
13,950,712


16) Total percentage holding of issued class following this notification

1.506%


     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 grant of the option



20) Description of shares or debentures involved: class, number.



21) Exercise price (if fixed at time of grant) or indication that price
    is to be fixed at time of exercise



22) Total number of shares or debentures over which options held
    following this notification



23) Any additional information


The DIRECTOR IN 2 ABOVE, TOGETHER WITH ALL OTHER EMPLOYEES, IS A POTENTIAL
BENEFICIARY OF THE EMPLOYEE BENEFIT TRUSTS ESTABLISHED IN RESPECT OF THE
LTSPP TO PROVIDE SPIRENT ORDINARY SHARES UNDER A LONG TERM SHARE PURCHASE
PLAN.

THIS IS NOT A DEALING BY A DIRECTOR.



24) Name of contact and telephone number for queries

LUKE THOMAS - 01293 767656


25) Name and signature of authorised company official responsible for
    making this notification

   Date of Notification    11 JANUARY 2001