Holding(s) in Company

Spirent PLC 21 January 2005 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 645,114 BANK OF NEW YORK 214075 4,908,886 BANK OF NEW YORK 221428 698,350 BANK OF NEW YORK 367748 2,386,871 BANK OF NEW YORK 392067 2,887,580 BANK OF NEW YORK 392177 405,953 BANK OF NEW YORK 768198 216,933 BARCLAYS CAPITAL NOMINEES LIMI 990,842 BNP PARIBAS 57,625 BNY (OCS) NOMINEES LTD 221476 205,774 BNY (OCS) NOMINEES LTD 387173 33,657 BOISS NOMINEES LTD 4224361 406,490 CHASE NOMINEES LTD 16376 562,967 CHASE NOMINEES LTD 16669 134,728 CHASE NOMINEES LTD 18243 123,823 CHASE NOMINEES LTD 19518 306,837 CHASE NOMINEES LTD 19519 2,646,373 CHASE NOMINEES LTD 20947 34,412,591 CHASE NOMINEES LTD 21359 1,483,196 CHASE NOMINEES LTD 25772 696,431 CHASE NOMINEES LTD 27793 82,603 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 27802 26,754 CHASE NOMINEES LTD 27804 26,545 CHASE NOMINEES LTD 28270 365,798 CHASE NOMINEES LTD 28270 999,243 CHASE NOMINEES LTD 31961 2,061,118 CIBC MELLON GLOBAL SECURITIES 47,233 CITIBANK 6010613363 86,613 CITIBANK 6010640794 253,843 CITIBANK 6010782807 433,211 DEUTSCHE BANK LONDON 8003168 30,331 HSBC 813168 713,817 HSBC 814537 80,198 HSBC 845315 23,453 INVESTORS BANK AND TRUST CO 29,665 INVESTORS BANK AND TRUST CO 3,103,713 INVESTORS BANK AND TRUST CO 508,306 INVESTORS BANK AND TRUST CO 1,017,482 INVESTORS BANK AND TRUST CO 661,501 INVESTORS BANK AND TRUST CO 14,730 INVESTORS BANK AND TRUST CO 124,416 JP MORGAN (BGI CUSTODY) 16331 351,468 JP MORGAN (BGI CUSTODY) 16341 1,768,141 JP MORGAN (BGI CUSTODY) 16341 593,372 JP MORGAN (BGI CUSTODY) 16344 567,650 JP MORGAN (BGI CUSTODY) 16345 977,469 JP MORGAN (BGI CUSTODY) 16400 10,298,369 JP MORGAN (BGI CUSTODY) 16612 289,986 JP MORGAN (BGI CUSTODY) 16621 241,168 JP MORGAN (BGI CUSTODY) 16644 297,267 JP MORGAN (BGI CUSTODY) 16901 149,752 JP MORGAN (BGI CUSTODY) 18409 484,895 JP MORGAN (BGI CUSTODY) 19514 82,721 JP MORGAN (BGI CUSTODY) 27795 228,835 JP MORGAN (BGI CUSTODY) 27799 1,070,521 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 205,189 MELLON BANK ABGFZ872482 516,582 MELLON BANK TGGF0003002 101,154 MELLON TRUST - BOSTON & SF 163,524 MELLON TRUST OF NEW ENGLAND 204,115 MIDLAND BANK (HSBC BANK PLC) 772823 2,682,742 NORTHERN TRUST BCP04 67,019 NORTHERN TRUST CVS21 1,012,315 NORTHERN TRUST SCO06 303,975 NORTHERN TRUST TNF01 481,183 NORTHERN TRUST USF06 193,023 NORTHERN TRUST USF12 1,321,652 NORTHERN TRUST BANK - BGI SEPA 189,697 NORTHERN TRUST BANK - BGI SEPA 265,504 NORTHERN TRUST BANK - BGI SEPA 53,646 R C GREIG NOMINEES LIMITED A/C BL1 132,653 R C GREIG NOMINEES LIMITED A/C CM1 34,397 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 42,101 STATE STREET N3YZ 10,972 ZEBAN NOMINEES LIMITED 21,700 ZEBAN NOMINEES LIMITED 1,000 TOTAL 97,113,892 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 19 JANUARY 2005 11. Date company informed 21 JANUARY 2005 12. Total holding following this notification 97,113,892 13. Total percentage holding of issued class following this notification 10.13% 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 10.13%. SHAREHOLDER PREVIOUSLY REPORTED A SHAREHOLDING OF 49,197,453 SHARES (5.15%) ON 25 NOVEMBER 2004. 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 21 JANUARY 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. This information is provided by RNS The company news service from the London Stock Exchange ND HOLPKDKBBBKDBDB
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