SPIRENT PLC - Holding(s) in Company


CRAWLEY, UK, Sept. 29, 2004 (PRIMEZONE) -- SCHEDULE 10

NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of company

SPIRENT PLC

2. Name of shareholder having a major interest

FIDELITY INTERNATIONAL LIMITED

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

COMPANY NAMED IN BOX 2 ABOVE AND ITS DIRECT AND INDIRECT SUBSIDIARIES, BEING NON-BENEFICIAL HOLDERS

4. Name of the registered holder(s) and, if more than one holder, the number of shares held by each of them

CHASE MANHATTAN BANK LONDON TOTAL (FIL) 443,649

DEUTSCHE BANK TOTAL (FIL) 37,476,297

NORTHERN TRUST TOTAL (FIL) 150,300

JP MORGAN TOTAL (FISL) 196,866

TOTAL 38,267,112

FISL = Fidelity Investment Services Limited FPM = Fidelity Pension Management FIL = Fidelity International Limited

5. Number of shares / amount of stock acquired

NOT KNOWN

6. Percentage of issued class

NOT KNOWN

7. Number of shares / amount of stock disposed

-

8. Percentage of issued class

-

9. Class of security

ORDINARY SHARES OF 3.3333 PENCE EACH

10. Date of transaction

NOT NOTIFIED

11. Date company informed

29 SEPTEMBER 2004

12. Total holding following this notification

38,267,112

13. Total percentage holding of issued class following this notification

4.01%

14. Any additional information

15. Name of contact and telephone number for queries

LUKE THOMAS - 01293 767658

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

LUKE THOMAS - DEPUTY COMPANY SECRETARY

Date of notification

29 SEPTEMBER 2004

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