Director Shareholding

Spirent PLC
18 May 2004

                                  SCHEDULE 11

          NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS



1. Name of company


SPIRENT PLC



2. Name of director


FREDERICK D'ALESSIO



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)


NOT NOTIFIED



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


ACQUISITION OF SHARES



7. Number of shares / amount of stock acquired


7,000



8. Percentage of issued class


0.003%



9. Number of shares/amount of stock disposed


N/A



10. Percentage of issued class


N/A



11. Class of security


SPIRENT AMERICAN DEPOSITARY RECEIPTS (ADRs).  SEE ADDITIONAL INFORMATION



12. Price per share


2,300 ADRs AT $4.08 PER ADR

4,700 ADRs AT $4.10 PER ADR



13. Date of transaction


17 MAY 2004



14. Date company informed


17 MAY 2004



15. Total holding following this notification


7,000 ADRs



16. Total percentage holding of issued class following this notification


0.003%



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



17. Date of grant


N/A



18. Period during which or date on which exercisable


N/A



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


N/A



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


N/A



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


N/A



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


N/A



23. Any additional information


THE COMPANY HAS ORDINARY SHARES EACH OF 3.3333 PENCE NOMINAL VALUE.  THE
ORDINARY SHARES ARE ALSO TRADED ON THE NEW YORK STOCK EXCHANGE IN THE FORM OF
AMERICAN DEPOSITARY SHARES AND THESE ARE EVIDENCED BY AMERICAN DEPOSITARY
RECEIPTS, EACH ONE OF WHICH REPRESENTS FOUR ORDINARY SHARES.  THE ABOVE SHARES
WERE PURCHASED IN THE FORM OF AMERICAN DEPOSITARY RECEIPTS.



24. Name of contact and telephone number for queries


LUKE THOMAS - 01293 767658



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


LUKE THOMAS - DEPUTY COMPANY SECRETARY



Date of Notification


18 MAY 2004



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