Director/PDMR Shareholding

Spirent PLC
26 August 2005


NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL
RESPONSIBILITY OR CONNECTED PERSONS

This form is intended for use by an issuer to make a RIS notification required
by DR 3.1.4R(1).

     
(1)  An issuer making a notification in respect of a transaction relating to the 
     shares or debentures of the issuer should complete boxes 1 to 16, 23 and 
     24.

(2)  An issuer making a notification in respect of a derivative relating to the 
     shares of the issuer should complete boxes 1 to 4, 6, 8, 13, 14, 16, 23 and 
     24.

(3)  An issuer making a notification in respect of options granted to a 
     director/person discharging managerial responsibilities should complete 
     boxes 1 to 3 and 17 to 24.

(4)  An issuer making a notification in respect of a financial instrument 
     relating to the shares of the issuer (other than a debenture) should 
     complete boxes 1 to 4, 6, 8, 9, 11, 13, 14, 16, 23 and 24.


Please complete all relevant boxes in block capital letters.


1. Name of the issuer

SPIRENT PLC


2. State whether the notification relates to (i) a transaction notified in
accordance with DR 3.1.4R(1)(a); or

(ii) DR 3.1.4(R)(1)(b) a disclosure made in accordance with section 324 (as
extended by section 328) of the Companies Act 1985; or

(iii) both (i) and (ii)

(III) BOTH (I) AND (II)


3. Name of person discharging managerial responsibilities/director

ERIC HUTCHINSON


4. State whether notification relates to a person connected with a person
discharging managerial responsibilities/director named in 3 and identify the
connected person

N/A


5. Indicate whether the notification is in respect of a holding of the person
referred to in 3 or 4 above or in respect of a non-beneficial interest

IN RESPECT OF DIRECTOR'S NON-BENEFICIAL HOLDING (SEE ADDITIONAL INFORMATION
BELOW - PERFORMANCE SHARE AWARD)


6. Description of shares (including class), debentures or derivatives or
financial instruments relating to shares

ORDINARY SHARES OF 3 & 1/3 PENCE EACH


7. Name of registered shareholders(s) and, if more than one, the number of
shares held by each of them

SEE ADDITIONAL INFORMATION BELOW - PERFORMANCE SHARE AWARD ISSUED AS NEW SHARES
ON VESTING


8 State the nature of the transaction

PERFORMANCE SHARE AWARD


9. Number of shares, debentures or financial instruments relating to shares
acquired

187,200


10. Percentage of issued class acquired (treasury shares of that class should
not be taken into account when calculating percentage)

0.019 %


11. Number of shares, debentures or financial instruments relating to shares
disposed

N/A


12. Percentage of issued class disposed (treasury shares of that class should
not be taken into account when calculating percentage)

N/A


13. Price per share or value of transaction

AWARD MADE WITH NO MONETARY CONSIDERATION CALCULATED BY REFERENCE TO SHARE PRICE
OF 53.00 PENCE PER SHARE AT CLOSE OF BUSINESS ON THURSDAY, 25 AUGUST 2005.


14. Date and place of transaction

25 AUGUST 2005
CRAWLEY, WEST SUSSEX

15. Total holding following notification and total percentage holding following
notification (any treasury shares should not be taken into account when
calculating percentage)

940,907 ORDINARY SHARES REPRESENTING 0.098% OF ISSUED SHARE CAPITAL (187,200 ARE
NON-BENEFICIAL AND 753,707 ARE BENEFICIAL)


16. Date issuer informed of transaction

25 AUGUST 2005


If a person discharging managerial responsibilities has been granted options by
the issuer complete the following boxes


17 Date of grant

25 AUGUST 2005


18. Period during which or date on which it can be exercised

25 AUGUST 2008 TO 24 AUGUST 2015


19. Total amount paid (if any) for grant of the option

N/A


20. Description of shares or debentures involved (class and number)

695,300 OPTIONS OVER ORDINARY SHARES OF 3 & 1/3 PENCE EACH


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

53.00 PENCE PER SHARE


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

3,904,533 OPTIONS OVER ORDINARY SHARES OF 3 & 1/3 PENCE EACH


23. Any additional information

1. PERFORMANCE SHARE AWARD

MR HUTCHINSON HAS BEEN GRANTED PERFORMANCE SHARES IN THE FORM OF A CONDITIONAL
AWARD OF SHARES UNDER THE SPIRENT EMPLOYEE INCENTIVE PLAN. THE SHARES TO SATISFY
THIS AWARD WILL BE NEWLY ISSUED ON THE VESTING DATE ON 25 AUGUST 2008. MR
HUTCHINSON WILL ONLY RECEIVE THE BENEFICIAL INTEREST IN THESE PERFORMANCE SHARES
IF HE REMAINS EMPLOYED BY THE COMPANY ON THAT DATE AND PROVIDED THAT THE COMPANY
MEETS THE PERFORMANCE CONDITIONS SET BY THE REMUNERATION COMMITTEE IN RESPECT OF
THIS AWARD.

2. GRANT OF SHARE OPTIONS

THE OPTION AWARD HAS BEEN MADE UNDER THE SPIRENT EMPLOYEE INCENTIVE PLAN AND
VESTING ON THE THIRD ANNIVERSARY OF THE GRANT DATE IS SUBJECT TO THE COMPANY
MEETING THE PERFORMANCE CONDITIONS SET BY THE REMUNERATION COMMITTEE IN RESPECT
OF THIS AWARD.


24. Name of contact and telephone number for queries

MICHAEL ANSCOMBE, ASSISTANT COMPANY SECRETARY
Tel: [phone]


Name and signature of duly authorised officer of issuer responsible for making
notification

MICHAEL ANSCOMBE, ASSISTANT COMPANY SECRETARY


Date of notification

26 AUGUST 2005


END

                      This information is provided by RNS
            The company news service from the London Stock Exchange