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 May, 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
JP MORGAN BOURNEMOUTH (FII) 423,700
BANK OF NEW YORK BRUSSELS (FIL) 397,900
BROWN BROS HARRIMN LTD LUX (FIL) 9,946,307
NORTHERN TRUST LONDON (FIL) 38,000
JP MORGAN BOURNEMOUTH (FISL) 8,009,776
BANK OF NEW YORK BRUSSELS (FPM) 1,538,500
BANKERS TRUST LONDON (FPM) 653,500
CITIBANK LONDON (FPM) 633,900
CLYDESDALE BANK PLC (FPM) 145,200
JP MORGAN BOURNEMOUTH (FPM) 2,137,917
MELLON BANK (FPM) 1,286,200
MIDLAND SECURITIES SERVICES (FPM) 347,000
NORTHERN TRUST LONDON (FPM) 2,834,700
STATE STR BK AND TR CO LNDN (FPM) 837,800
BROWN BROTHERS HARRIMAN AND CO (IN FORM OF 11,000 ADRS) 44,000
TOTAL 29,274,400
FII = Fidelity Investments International
FIL = Fidelity International Limited
FISL = Fidelity Investment Services Limited
FPM = Fidelity Pension Management
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 NOTIFIED
11. Date company informed
05 MAY 2005
12. Total holding following this notification
29,274,400
13. Total percentage holding of issued class following this notification
3.04%
14. Any additional information
THE SHAREHOLDER HAD PREVIOUSLY REPORTED TO THE COMPANY ON 4 MARCH 2005 THAT IT
NO LONGER HELD A NOTIFIABLE INTEREST IN THE COMPANY.
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
06 MAY 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 06 May, 2005 By ____/s/ Luke Thomas____
(Signature)*