Director Shareholding

Spirent PLC
14 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)

    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.
    
7)  Number of shares/amount of
    stock acquired

    343,230

8)   (0.042 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed



10)  ( N/A %)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3p EACH 

12) Price per share

    560p

13) Date of transaction

    08 DECEMBER 2000

14) Date company informed

    08 DECEMBER 2000

15) Total holding following this notification

      104,584 PERSONAL
    5,360,655 HOLDING IN QUEST (SEE BOX 6)
    8,452,823 HOLDING IN LTSPP (SEE BOX 23)
   ----------
   13,918,062

16) Total percentage holding of issued class following this notification

    1.703%

     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 DIRECTOR

24) Name of contact and telephone number for queries

    J E GOMM - 01293 767565

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

   Date of Notification    14 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)

    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.
    
7)  Number of shares/amount of
    stock acquired

    343,230

8)   (0.042 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed



10)  ( N/A %)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3p EACH 

12) Price per share

    560p

13) Date of transaction

    08 DECEMBER 2000

14) Date company informed

    11 DECEMBER 2000

15) Total holding following this notification

       34,405 PERSONAL
    5,360,655 HOLDING IN QUEST (SEE BOX 6)
    8,452,823 HOLDING IN LTSPP (SEE BOX 23)
   ----------
   13,848,883

16) Total percentage holding of issued class following this notification

    1.695%

     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 DIRECTOR

24) Name of contact and telephone number for queries

    J E GOMM - 01293 767565

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

   Date of Notification    14 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)

    ORBIS PENSION TRUST LIMITED T019

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 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

    577,896

8)   (0.070 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed



10)  ( N/A %)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3p EACH 

12) Price per share

    560p

13) Date of transaction

    08 DECEMBER 2000

14) Date company informed

    11 DECEMBER 2000

15) Total holding following this notification

       38,911 PERSONAL
    5,360,655 HOLDING IN QUEST (SEE BOX 6)
    9,030,719 HOLDING IN LTSPP (SEE BOX 23)
   ----------
   14,430,286

16) Total percentage holding of issued class following this notification

    1.7661%

     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 DIRECTOR

24) Name of contact and telephone number for queries

    J E GOMM - 01293 767565

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

   Date of Notification    14 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)

    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)

    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 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

    577,896

8)   (0.070 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed



10)  ( N/A %)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3p EACH 

12) Price per share

    560p

13) Date of transaction

    08 DECEMBER 2000

14) Date company informed

    08 DECEMBER 2000

15) Total holding following this notification

      104,584 PERSONAL
    5,360,655 HOLDING IN QUEST (SEE BOX 6)
    9,030,719 HOLDING IN LTSPP (SEE BOX 23)
   ----------
   14,495,958

16) Total percentage holding of issued class following this notification

    1.7741%

     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 DIRECTOR

24) Name of contact and telephone number for queries

    J E GOMM - 01293 767565

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

   Date of Notification    14 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)

    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

    EXERCISE OF OPTIONS UNDER THE COMPANY'S SAVINGS RELATED SHARE OPTION SCHEME
    
7)  Number of shares/amount of
    stock acquired

    3,506

8)   (0.0004 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed



10)  ( N/A %)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3p EACH 

12) Price per share

    88.90p

13) Date of transaction

    13 DECEMBER 2000

14) Date company informed

    13 DECEMBER 2000

15) Total holding following this notification

    38,911

16) Total percentage holding of issued class following this notification

    0.0048%

     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


24) Name of contact and telephone number for queries

    J E GOMM - 01293 767565

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

   Date of Notification    14 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)

    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

    396,297

10)  (0.049%)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3p EACH 

12) Price per share

    347.298 @ 106.47p
     46.999 @ 88.90p

13) Date of transaction

    13 DECEMBER 2000

14) Date company informed

    13 DECEMBER 2000

15) Total holding following this notification

      104,584 PERSONAL
    4,964,358 HOLDING IN QUEST (SEE BOX 6)
    9,030,719 HOLDING IN LTSPP (SEE BOX 23)
   ----------
   14,099,661

16) Total percentage holding of issued class following this notification

    1.726%

     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 DIRECTOR

24) Name of contact and telephone number for queries

    J E GOMM - 01293 767565

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

   Date of Notification    14 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)

    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

    396,297

10)  (0.0485%)
    of issued Class


11) Class of security

    ORDINARY SHARES OF 3 1/3p EACH 

12) Price per share

    347.298 @ 106.47p
     48,999 @ 88.90p

13) Date of transaction

    13 DECEMBER 2000

14) Date company informed

    13 DECEMBER 2000

15) Total holding following this notification

       38,911 PERSONAL
    4,964,358 HOLDING IN QUEST (SEE BOX 6)
    9,030,719 HOLDING IN LTSPP (SEE BOX 23)
   ----------
   14,033,968

16) Total percentage holding of issued class following this notification

    1.718%

     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 DIRECTOR

24) Name of contact and telephone number for queries

    J E GOMM - 01293 767565

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

   Date of Notification    14 DECEMBER 2000