SOURCE: Spirent PLC

February 09, 2006 07:45 ET

Spirent PLC announces Holding(s) in Company

Crawley, UK -- (MARKET WIRE) -- February 9, 2006 --

                NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of listed company

SPIRENT PLC

2. Name of shareholder with a major interest

FIDELITY INTERNATIONAL LIMITED

3. Please state whether notification indicates that regarding the holding of the shareholder named in 2 above; 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

SHAREHOLDER IN 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

JP MORGAN BOURNEMOUTH (FPM)                3,743,793
NORTHERN TRUST LONDON (FPM)                2,851,100
MELLON BANK (FPM)                          1,483,900
BANK OF NEW YORK BRUSSELS (FPM)            1,232,100
STATE STR BK AND TR CO LNDN (FPM)          1,055,400
BANKERS TRUST LONDON (FPM)                   823,500
MIDLAND SECURITIES SERVICES (FPM)            371,200
CLYDESDALE BANK PLC (FPM)                    118,700
JP MORGAN BOURNEMOUTH (FISL)              27,491,787
BROWN BROS HARRIMN LTD LUX (FIL)          35,845,733
BANK OF NEW YORK BRUSSELS (FIL)              415,700
NORTHERN TRUST LONDON (FIL)                  136,100
JP MORGAN, BOURNEMOUTH (FII)               1,395,500
BNP PARIBAS, PARIS (FIGEST)                  521,500
TOTAL                                     77,486,013

FPM = Fidelity Pension Management
FISL = Fidelity Investment Services Limited
FIL = Fidelity International Limited
FII = Fidelity Investments International
FIGEST = Fidelity Gestion

5. Number of shares / amount of stock acquired

NOT KNOWN

6. Percentage of issued class (any treasury shares held by the listed company should not be taken into account when calculating percentage)

NOT KNOWN

7. Number of shares / amount of stock disposed

-

8. Percentage of issued class (any treasury shares held by the listed company should not be taken into account when calculating percentage)

-

9. Class of security

ORDINARY SHARES OF 3.3333 PENCE EACH

10. Date of transaction

NOT KNOWN

11. Date company informed

09 FEBRUARY 2006

12. Total holding following this notification

77,486,013

13. Total percentage holding of issued class following this notification (any treasury shares held by the listed company should not be taken into account when calculating percentage)

8.02%

14. Any additional information

ON 16 DECEMBER 2005 THE SHAREHOLDER REPORTED TO THE COMPANY THAT IT HAD REDUCED ITS HOLDING IN THE COMPANY TO 75,458,913 SHARES (7.81%).

15. Name of contact and telephone number for queries

LUKE THOMAS - 01293 767658

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

LUKE THOMAS - DEPUTY COMPANY SECRETARY

Date of notification

09 FEBRUARY 2006

                   This information is provided by RNS
         The company news service from the London Stock Exchange