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 February, 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
BARCLAYS 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 NAMED 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
Registered Holder Account designation Holding
BANK OF IRELAND 4239749 1,084,302
BANK OF NEW YORK 214075 5,915,102
BANK OF NEW YORK 221428 866,143
BANK OF NEW YORK 367748 2,907,094
BANK OF NEW YORK 392067 3,326,323
BANK OF NEW YORK 392177 489,732
BANK OF NEW YORK 768198 216,933
BARCLAYS CAPITAL NOMINEES LIMI 565,420
BNP PARIBAS 219,175
BNY (OCS) NOMINEES LTD 221476 382,174
BNY (OCS) NOMINEES LTD 387173 71,285
BOISS NOMINEES LTD 4224361 406,490
CHASE NOMINEES LTD 16376 527,631
CHASE NOMINEES LTD 16669 134,728
CHASE NOMINEES LTD 18243 123,823
CHASE NOMINEES LTD 19518 379,214
CHASE NOMINEES LTD 19519 2,634,098
CHASE NOMINEES LTD 19520 213,550
CHASE NOMINEES LTD 20947 38,680,837
CHASE NOMINEES LTD 21359 1,483,196
CHASE NOMINEES LTD 25772 863,420
CHASE NOMINEES LTD 27793 66,723
CHASE NOMINEES LTD 27795 102,621
CHASE NOMINEES LTD 27797 138,568
CHASE NOMINEES LTD 27799 299,495
CHASE NOMINEES LTD 27800 1,037,801
CHASE NOMINEES LTD 28270 365,798
CHASE NOMINEES LTD 28270 1,172,155
CHASE NOMINEES LTD 31961 2,294,832
CIBC MELLON GLOBAL SECURITIES 132,574
CITIBANK 6010613363 86,613
CITIBANK 6010640794 253,843
CITIBANK 6010782807 462,289
DEUTSCHE BANK LONDON 8003168 30,331
HSBC 813168 869,384
HSBC 814537 80,198
HSBC 845315 23,453
INVESTORS BANK AND TRUST CO 67,293
INVESTORS BANK AND TRUST CO 1,095,438
INVESTORS BANK AND TRUST CO 2,358,360
INVESTORS BANK AND TRUST CO 6,980,817
INVESTORS BANK AND TRUST CO 708,218
INVESTORS BANK AND TRUST CO 14,730
INVESTORS BANK AND TRUST CO 128,304
JP MORGAN (BGI CUSTODY) 16331 351,468
JP MORGAN (BGI CUSTODY) 16341 2,025,059
JP MORGAN (BGI CUSTODY) 16341 593,372
JP MORGAN (BGI CUSTODY) 16344 705,203
JP MORGAN (BGI CUSTODY) 16345 1,191,612
JP MORGAN (BGI CUSTODY) 16400 10,298,369
JP MORGAN (BGI CUSTODY) 16612 415,341
JP MORGAN (BGI CUSTODY) 16621 277,635
JP MORGAN (BGI CUSTODY) 16644 636,237
JP MORGAN (BGI CUSTODY) 16901 181,820
JP MORGAN (BGI CUSTODY) 18409 469,969
JP MORGAN (BGI CUSTODY) 19514 175,421
JP MORGAN (BGI CUSTODY) 27795 445,925
JP MORGAN (BGI CUSTODY) 27799 1,267,446
JP MORGAN (BGI CUSTODY) 28166 3,027,976
JP MORGAN CHASE BANK 340,332
JP MORGAN CHASE BANK 190,590
JP MORGAN CHASE BANK 409,555
JP MORGAN CHASE BANK 633,980
JP MORGAN CHASE BANK 550,285
MELLON BANK ABGFZ872482 827,679
MELLON BANK TGGF0003002 101,154
MELLON TRUST - BOSTON & SF 367,265
MELLON TRUST OF NEW ENGLAND 458,475
MIDLAND BANK (HSBC BANK PLC) 772823 3,318,353
NORTHERN TRUST BCP04 67,019
NORTHERN TRUST CVS21 1,242,437
NORTHERN TRUST SCO06 303,975
NORTHERN TRUST TNF01 532,061
NORTHERN TRUST USF06 193,023
NORTHERN TRUST USF12 1,681,150
NORTHERN TRUST BANK - BGI SEPA 510,728
NORTHERN TRUST BANK - BGI SEPA 586,640
NORTHERN TRUST BANK - BGI SEPA 116,798
R C GREIG NOMINEES LIMITED A/C BL1 119,587
R C GREIG NOMINEES LIMITED A/C CM1 33,409
R C GREIG NOMINEES LIMITED GP1 GP1 30,098
R C GREIG NOMINEES LIMITED SA1 SA1 20,902
STATE STREET 2RJ2 127,458
STATE STREET JD12 447,165
STATE STREET N3B6 200,097
STATE STREET N3YZ 27,706
ZEBAN NOMINEES LIMITED 21,700
ZEBAN NOMINEES LIMITED 1,000
TOTAL 115,783,982
5. Number of shares / amount of stock acquired
NOT NOTIFIED
6. Percentage of issued class
NOT NOTIFIED
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
HOLDING AS AT 16 FEBRUARY 2005
11. Date company informed
21 FEBRUARY 2005
12. Total holding following this notification
115,783,982
13. Total percentage holding of issued class following this notification
12.07%
14. Any additional information
NOTIFICATION RECEIVED PURSUANT TO S198-202 COMPANIES ACT 1985 THAT THE
SHAREHOLDER NAMED IN 2 ABOVE HAS INCREASED THEIR NOTIFIABLE SHAREHOLDING IN
SPIRENT PLC TO 12.07%. SHAREHOLDER PREVIOUSLY REPORTED A SHAREHOLDING OF
105,807,731 SHARES (11.03%) ON 27 JANUARY 2005.
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
21 FEBRUARY 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 21 February, 2005 By ____/s/ Luke Thomas____
(Signature)*