Director Shareholding

Spirent PLC
22 December 2000

                       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

HOLDINGS 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)

ORBIS PENSION TRUSTEES LIMITED T1019


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



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 OPTIONS HOLDERS, IS A
POTENTIAL BENEFICIARY OF THE EMPLOYEE BENEFIT TRUST ESTABLISHED IN RESPECT OF
THE LTSPP TO PROVIDE SPIRENT ORDINARY SHARES UNDER A LONG TERM SHARE PURCHASE
PLAN.


7)  Number of shares/amount of
    stock acquired



8)   (N/A %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

5,000


10)  (0.0005 %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3P EACH



12) Price per share

600P


13) Date of transaction

21 DECEMBER 2000


14) Date company informed

21 DECEMBER 2000


15) Total holding following this notification

    38,911 PERSONAL
 4,895,543 HOLDING IN QUEST (SEE BOX 6)
 9,025,719 HOLDING IN LTSPP (SEE BOX 23)

13,960,173


16) Total percentage holding of issued class following this notification

1.508%


     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


JO GOMM - 01293  767656

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


   Date of Notification          22 DECEMBER 2000                       


                       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

HOLDINGS 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)

ORBIS PENSION TRUSTEES LIMITED T1019


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



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 OPTIONS HOLDERS, IS A
POTENTIAL BENEFICIARY OF THE EMPLOYEE BENEFIT TRUST ESTABLISHED IN RESPECT OF
THE LTSPP TO PROVIDE SPIRENT ORDINARY SHARES UNDER A LONG TERM SHARE PURCHASE
PLAN.


7)  Number of shares/amount of
    stock acquired



8)   (N/A %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

5,000


10)  (0.0005 %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3P EACH



12) Price per share

600P


13) Date of transaction

21 DECEMBER 2000


14) Date company informed

21 DECEMBER 2000


15) Total holding following this notification

   104,584 PERSONAL
 4,895,543 HOLDING IN QUEST (SEE BOX 6)
 9,025,719 HOLDING IN LTSPP (SEE BOX 23)
14,025,846


16) Total percentage holding of issued class following this notification

1.515%


     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


JO GOMM - 01293  767656

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


   Date of Notification          22 DECEMBER 2000                       


                       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)



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 OPTIONS HOLDERS, IS A
POTENTIAL BENEFICIARY OF THE EMPLOYEE BENEFIT TRUST TO THE EXTENT OF HIS
INDIVIDUAL SAYE SHAREHOLDING



7)  Number of shares/amount of
    stock acquired



8)   (N/A %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

68,815



10)  (0.0074 %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3P EACH



12) Price per share

    7239 @ 1,0647
    3506 @ 0.8890
    4664 @ 0.7602
    1688 @ 0.9361
   18,361 @ 1.0357
   20,605 @ 1.0856
    2139 @ 1.4210
   10,613 @ 0.8321


13) Date of transaction

18 DECEMBER 2000


14) Date company informed

18 DECEMBER 2000


15) Total holding following this notification

   104,584 PERSONAL
 4,895,543 HOLDING IN QUEST (SEE BOX 6)
 9,030,719 HOLDING IN LTSPP (SEE BOX 23)

14,030,846


16) Total percentage holding of issued class following this notification

1.515%


     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


JO GOMM - 01293  767658

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



   Date of Notification          22 DECEMBER 2000                       

  
                       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)



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 OPTIONS HOLDERS, IS A
POTENTIAL BENEFICIARY OF THE EMPLOYEE BENEFIT TRUST TO THE EXTENT OF HIS
INDIVIDUAL SAYE SHAREHOLDING



7)  Number of shares/amount of
    stock acquired



8)   (N/A %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

68,815



10)  (0.0074 %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3P EACH



12) Price per share

    7239 @ 1,0647
    3506 @ 0.8890
    4664 @ 0.7602
    1688 @ 0.9361
   18,361 @ 1.0357
   20,605 @ 1.0856
    2139 @ 1.4210
   10,613 @ 0.8321


13) Date of transaction

18 DECEMBER 2000


14) Date company informed

18 DECEMBER 2000


15) Total holding following this notification

    38,911 PERSONAL
 4,895,543 HOLDING IN QUEST (SEE BOX 6)
 9,030,719 HOLDING IN LTSPP (SEE BOX 23)

13,965,173


16) Total percentage holding of issued class following this notification

1.508%


     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


JO GOMM - 01293  767656

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


   Date of Notification          22 DECEMBER 2000