Director/PDMR Shareholding

Spirent PLC
10 April 2006

                                  SCHEDULE 11

          NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS



1. Name of company


SPIRENT PLC



2. Name of director


ERIC 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 a 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)


N/A



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


N/A



7. Number of shares / amount of stock acquired


N/A



8. Percentage of issued class


N/A



9. Number of shares/amount of stock disposed


N/A









10. Percentage of issued class


N/A



11. Class of security


N/A



12. Price per share


N/A



13. Date of transaction


N/A



14. Date company informed


N/A



15. Total holding following this notification


N/A



16. Total percentage holding of issued class following this notification


N/A



If a director has been granted options by the company please complete the
following boxes.



17. Date of grant


9 APRIL 2001



18. Period during which or date on which exercisable


9 APRIL 2004 to 8 APRIL 2011



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


N/A



20. Description of shares or debentures involved: class, number


LAPSE OF 105,000 SHARE OPTIONS GRANTED UNDER THE SPIRENT EXECUTIVE SHARE OPTION 
SCHEME 1995







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


SHARE OPTION EXERCISE PRICE OF 305 PENCE PER SHARE



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


3,986,733



23. Any additional information


VESTING OF THE 105,000 SHARE OPTIONS GRANTED TO MR HUTCHINSON ON 9 APRIL 2001
UNDER THE SPIRENT EXECUTIVE SHARE OPTION SCHEME 1995 WAS SUBJECT TO AN ENHANCED
PERFORMANCE CONDITION (EPC). THE EPC WAS TESTED ON THE THIRD, FOURTH AND FIFTH
ANNIVERSARY OF GRANT.  AS THE EPC WAS NOT ATTAINED ON 9 APRIL 2006, BEING THE
FIFTH ANNIVERSARY OF GRANT, THE 105,000 SHARE OPTIONS NOW LAPSE.





24. Name of contact and telephone number for queries


WARREN NASH



TEL: [phone]



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


WARREN NASH



Date of Notification


10 APRIL 2006



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