SOURCE: Spirent PLC

April 10, 2006 09:19 ET

Spirent PLC announces - Director/PDMR Shareholding

Crawley, UK -- (MARKET WIRE) -- April 10, 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: 01293 767676

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

WARREN NASH

Date of Notification

10 APRIL 2006

The FSA does not give any express or implied warranty as to the accuracy of this document or material and does not accept any liability for error or omission. The FSA is not liable for any damages (including, without limitation, damages for loss of business or loss of profits) arising in contract, tort or otherwise from the use of or inability to use this document, or any material contained in it, or from any action or decision taken as a result of using this document or any such material.

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