UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of June, 2005
SPIRENT plc
_____________________________________________________________________
(Translation of registrant's name into English)
Spirent House, Crawley Business Quarter, Fleming Way, Crawley, West Sussex
RH10 9QL, UK.
_____________________________________________________________________
(Address of principal executive offices)
Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F.
Form 20-F X Form 40-F.....
Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.
Yes ..... No X
If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b): 82- ________
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
CDC FINANCE (FIGEST) 21,500
JP MORGAN, BOURNEMOUTH (FII) 610,700
BROWN BROTHERS HARRIMAN AND CO (FIJ) 7,200
BANK OF NEW YORK BRUSSELS (FIL) 439,500
BNP PARIBAS, PARIS (C) (FIL) 19,600
BROWN BROTHERS HARRIMN LTD LUX (FIL) 13,437,494
NORTHERN TRUST LONDON (FIL) 69,200
JP MORGAN BOURNEMOUTH (FISL) 11,251,776
BANK OF NEW YORK BRUSSELS (FPM) 1,772,800
BANKERS TRUST LONDON (FPM) 722,000
CLYDESDALE BANK PLC (FPM) 160,300
HSBC BANK PLC (FPM) 156,000
JP MORGAN BOURNEMOUTH (FPM) 2,865,617
MELLON BANK (FPM) 1,421,400
MIDLAND SECURITIES SERVICES (FPM) 396,300
NORTHERN TRUST LONDON (FPM) 2,632,300
STATE STR BK AND TR CO LNDN (FPM) 1,317,000
BROWN BROTHERS HARRIMAN AND CO (IN FORM OF 11,000 ADRS) (FMRCO) 44,000
TOTAL 37,344,687
FIGEST = Fidelity Gestion
FII = Fidelity Investments International
FIJ = Fidelity Investments Japan
FIL = Fidelity International Limited
FISL = Fidelity Investment Services Limited
FPM = Fidelity Pension Management
FMRCO = Fidelity Management & Research Company
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
N/A
8. Percentage of issued class
N/A
9. Class of security
ORDINARY SHARES OF 3.3333 PENCE EACH
10. Date of transaction
NOT KNOWN
11. Date company informed
20 MAY 2005
12. Total holding following this notification
37,344,687
13. Total percentage holding of issued class following this notification
3.88%
14. Any additional information
SHAREHOLDER PREVIOUSLY REPORTED A SHAREHOLDING OF 28,694,687 SHARES (2.98%)
EARLIER TODAY.
15. Name of contact and telephone number for queries
MICHAEL ANSCOMBE - 01293 767672
16. Name and signature of authorised company official responsible for making
this notification
MICHAEL ANSCOMBE - ASSISTANT COMPANY SECRETARY
Date of notification
20 JUNE 2005
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.
Signatures
Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.
______LUKE THOMAS______
(Registrant)
Date __ 20 June 2005 By ____/s/ Luke Thomas____
(Signature)*