Director Shareholding

Spirent PLC
11 May 2005

                                  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


11 MAY 2000



18. Period during which or date on which exercisable


11 MAY 2003 TO 10 MAY 2010



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


N/A



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


LAPSE OF 55,562 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 334 PENCE PER SHARE



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


3,209,233



23. Any additional information


VESTING OF THE 55,562 SHARE OPTIONS GRANTED TO MR HUTCHINSON ON 11 MAY 2000 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 11 MAY 2005, BEING THE FIFTH ANNIVERSARY OF GRANT, THE 55,562
SHARE OPTIONS NOW LAPSE.





24. Name of contact and telephone number for queries


MICHAEL ANSCOMBE



TEL: [phone]



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


MICHAEL ANSCOMBE

ASSISTANT COMPANY SECRETARY



Date of Notification


11 MAY 2005



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