Director/PDMR Shareholding

Spirent PLC
02 May 2006

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) THIS NOTIFICATION IS MADE IN ACCORDANCE WITH BOTH



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



N/A



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



N/A



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



N/A



8 State the nature of the transaction



N/A



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



N/A



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



N/A



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



N/A



14. Date and place of transaction



N/A



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



N/A



16. Date issuer informed of transaction



N/A



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



17 Date of grant



29 APRIL 1996



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



29 APRIL 1999 TO 28 APRIL 2006



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



NIL



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



42,928 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



140 PENCE PER SHARE



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



3,943,805 OPTIONS OVER ORDINARY SHARES OF 3 & 1/3 PENCE EACH



23. Any additional information

IN ACCORDANCE WITH THE RULES OF THE SPIRENT EXECUTIVE SHARE OPTION SCHEME 1995,
MR HUTCHINSON'S 42,928 OPTIONS GRANTED ON 29 APRIL 1996, WHICH REMAINED
UNEXERCISED FOLLOWING THE TENTH ANIVERSARY OF THE GRANT DATE, HAVE NOW EXPIRED.

24. Name of contact and telephone number for queries



WARREN NASH

Tel: [phone]



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



WARREN NASH



Date of notification



2 MAY 2006


END


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