Director Shareholding

Spirent PLC
8 December 2000


Notification of Interests of Directors of Spirent plc

Spirent plc (the 'Company') announces today, that following the Company's Rights
Issue, the latest time for acceptance and payment in full of the Rights Issue
Shares being 3pm on 7 December 2000, adjustments have been made to outstanding
options awarded to its executive directors, the details of which are listed
below:

Savings Related Share Option Scheme

Director's       Date of     Pre-      Pre-   Adjusted    Adjusted     Exercise
Name               Grant   Rights    Rights     Option      no. of     Period   
                            issue     issue      Price     options
                           Option    number         
                            Price        of 
                           (pence)  options

N K Brookes    21.10.1996   116      14,868    108.5628    15,886     01.01.02-
                                                                      30.06.02

Total                                14,868                15,886

E G Hutchinson 22.10.1993    94.99    3,282     88.8998     3,506     01.12.00-
                                                                      31.05.01

               21.10.1994    81.23    4,800     76.0220     5,128     01.12.01-
                                                                      31.05.02

               31.10.1995   113.76    1,371    106.4664     1,464     01.12.02-
                                                                      31.05.03

               22.10.1998    88.91   11,571     83.2096    12,363     01.01.06-
                                                                      30.06.06

               21.10.1999   151.84      966    142.1050     1,032     01.12.06-
                                                                      31.05.07

               31.10.2000   554.00    1,194    518.4809     1,275     01.12.07-
                                                                      31.05.08

Total                                23,184                24,768



Executive's Share Option Scheme


Director's       Date of     Pre-      Pre-   Adjusted    Adjusted     Exercise
Name               Grant   Rights    Rights     Option      no. of     Period   
                            Issue     issue      Price     options
                           Option    number         
                            Price        of 
                           (pence)  options

N K Brookes    21.09.1995   142.20  212,910    133.0830   227,495     21.09.98-
                                                                      20.09.05

               30.09.1996   145.00  206,895    135.7035   221,068     30.09.99-
                                                                      20.09.06
                                                                      
               23.04.1997   126.50   28,461    118.3896    30,410     23.04.00-
                                                                      22.04.07

               27.04.1998   162.50   41,106    152.0815    43,922     27.04.01-
                                                                      26.04.08

               11.05.2000   357.00  140,000    334.1114   149,590     11.05.03-
                                                                      10.05.10

Total                               629,372               672,495



Director's       Date of     Pre-      Pre-   Adjusted    Adjusted     Exercise
Name               Grant   Rights    Rights     Option      no. of     Period   
                            Issue     issue      Price     Options
                           Option    number       post        post
                            Price        of     Rights      Rights
                           (pence)  options      Issue       Issue

E G Hutchinson 27.04.1995   115.00   16,521   107.6269      17,652     27.04.98-
                                                                       26.04.05

               29.04.1996   149.33   40,176   139.7559      42,928     29.04.99-
                                                                       28.04.06

               23.04.1997   126.50   31,620   118.3896      33,786     23.04.00-
                                                                       22.04.07

               27.04.1998   162.50   27,690   152.0815      29,586     27.04.01-
                                                                       26.04.08

               01.04.1999   142.17   70,338   133.0549      75,156     01.04.02-
                                                                       31.03.09

               11.05.2000   357.00   52,000   334.1114      55,562     11.05.03-
                                                                       10.05.10


Total                               238,345                254,670


The options awarded above under the Company's Savings Related Share Option
Scheme and the Executive Share Option Scheme are over Ordinary Shares of 3 1/3
pence each.



                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

SPIRENT plc


2)  NAME OF DIRECTOR

JAMES A D WYNESS


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

IN RESPECT OF THE DIRECTOR'S HOLDING

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

NOT NOTIFIED


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

TAKE UP OF RIGHTS UNDER THE COMPANY'S RIGHTS ISSUE


7)  Number of shares/amount of
    stock acquired

3,691


8)   ( 0.0005 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

-


10)  ( - %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3 p EACH



12) Price per share

375P


13) Date of transaction

8 DECEMBER 2000


14) Date company informed

8 DECEMBER 2000


15) Total holding following this notification

21,409


16) Total percentage holding of issued class following this notification

0.0026%


     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 767656


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

   Date of Notification    8 DECEMBER 2000            




                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

SPIRENT plc


2)  NAME OF DIRECTOR

NICHOLAS K 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

IN RESPECT OF THE DIRECTOR'S HOLDING

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

NOT NOTIFIED


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

TAKE UP OF RIGHTS UNDER THE COMPANY'S RIGHTS ISSUE


7)  Number of shares/amount of
    stock acquired

18,031


8)   ( 0.0022 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

-


10)  ( - %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3 p EACH



12) Price per share

375P


13) Date of transaction

8 DECEMBER 2000


14) Date company informed

8 DECEMBER 2000


15) Total holding following this notification

104,584


16) Total percentage holding of issued class following this notification

0.0128%


     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 767656


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

   Date of Notification    8 DECEMBER 2000            




                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

SPIRENT plc


2)  NAME OF DIRECTOR

PAUL M F CHENG

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

IN RESPECT OF THE DIRECTOR'S HOLDING

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

NOT NOTIFIED


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

TAKE UP OF RIGHTS UNDER THE COMPANY'S RIGHTS ISSUE


7)  Number of shares/amount of
    stock acquired

1,250


8)   ( 0.0002 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

-


10)  ( - %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3 p EACH



12) Price per share

375P


13) Date of transaction

8 DECEMBER 2000


14) Date company informed

8 DECEMBER 2000


15) Total holding following this notification

7,250


16) Total percentage holding of issued class following this notification

0.0009%


     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 767656


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

   Date of Notification    8 DECEMBER 2000            




                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

SPIRENT plc


2)  NAME OF DIRECTOR

ERIC G 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

IN RESPECT OF THE DIRECTOR'S HOLDING

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

NOT NOTIFIED


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

TAKE UP OF RIGHTS UNDER THE COMPANY'S RIGHTS ISSUE


7)  Number of shares/amount of
    stock acquired

6,104


8)   ( 0.0007 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

-


10)  ( - %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3 p EACH



12) Price per share

375P


13) Date of transaction

8 DECEMBER 2000


14) Date company informed

8 DECEMBER 2000


15) Total holding following this notification

35,405


16) Total percentage holding of issued class following this notification

0.0007%


     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 767656


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

   Date of Notification    8 DECEMBER 2000            



                       DEALINGS BY DIRECTORS


1)  NAME OF COMPANY

SPIRENT plc


2)  NAME OF DIRECTOR

MARCUS BERESFORD

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

IN RESPECT OF THE DIRECTOR'S HOLDING

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

NOT NOTIFIED


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

TAKE UP OF RIGHTS UNDER THE COMPANY'S RIGHTS ISSUE


7)  Number of shares/amount of
    stock acquired

2,625


8)   ( 0.0003 %)
    of issued Class


9)  Number of shares/amount
    of stock disposed

-


10)  ( - %)
    of issued Class


11) Class of security

ORDINARY SHARES OF 3 1/3 p



12) Price per share

375P


13) Date of transaction

8 DECEMBER 2000


14) Date company informed

8 DECEMBER 2000


15) Total holding following this notification

15,225


16) Total percentage holding of issued class following this notification

0.0019%


     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 767656


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

   Date of Notification    8 DECEMBER 2000