Director/PDMR Shareholding

Spirent Communications PLC
23 April 2007

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 COMMUNICATIONS 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



23 APRIL 1997



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



23 APRIL 2000 TO 22 APRIL 2007



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



NIL



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



33,786 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



118 PENCE PER SHARE



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



3,460,956 OPTIONS OVER ORDINARY SHARES OF 3 & 1/3 PENCE EACH



23. Any additional information

IN ACCORDANCE WITH THE RULES OF THE SPIRENT 1995 EXECUTIVE SHARE OPTION SCHEME,
MR HUTCHINSON'S 33,786 SHARE OPTIONS GRANTED ON 23 APRIL 1997 WITH AN EXERCISE
PRICE OF 118 PENCE PER SHARE, WHICH REMAINED UNEXERCISED ON THE TENTH ANNIVERSAY
OF THE DATE OF GRANT, 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, SHARE PLANS MANAGER



Date of notification



23 APRIL 2007


END


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