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 April, 2003
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
Prudential plc
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
Shareholder in 2 above
4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them
PRUCLT HSBC GIS NOM(UK) PAC AC 42,845,000
PRUCLT HSBC GIS NOM(UK) PHL AC 1,265,804
PRUCLT HSBC GIS NOM(UK) PAC AC 1,858,111
ROY NOMS LTD 578060 802,671
5. Number of shares / amount of stock acquired
N/A
6. Percentage of issued class
N/A
7. Number of shares / amount of stock disposed
1,322,015
8. Percentage of issued class
0.14%
9. Class of security
Ordinary shares of 3.333 pence each
10. Date of transaction
Not known
11. Date company informed
10 April 2003
12. Total holding following this notification
46,771,586
13. Total percentage holding of issued class following this notification
4.96%
14. Any additional information
Notification in accordance with S.198 Companies Act 1985 (as amended)
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
10 April 2003
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___10 April, 2003 ____ By ____/s/ Luke Thomas____
(Signature)*