Schedule 10 Notification of Major Interests in Shares


CRAWLEY, U.K., March 12, 2004 (PRIMEZONE) -- 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

  ABBEYUTTL-6010782807-VIDACOS N   ABBEYUTT              275,601
  ABPEURUKQ-872482-MELLON NOMINE   ABPEURUK              1,005,443
  ABUEURTTL-8003168-MORGAN NOMIN   ABUEURTT              64,576
  ALEXITTTL-28166-CHASE NOMINEES   ALEXITTT              2,971,464
  ALMLUFTTL-18409-CHASE MANHATTA   ALMLUFTT              487,521
  ASTEXMTTL-21359-CHASE NOMINEES   ASTEXMTT              1,220,660
  ASUKEXTTL-20947-CHASE MANHATTA   ASUKEXTT              41,814,134
  AXATRKTTL-845315-MIDLAND BANK    AXATRKTT              23,453
  B2350FTTL-19499-CHASE MANHATTA   B2350FTT              106,298
  BARCLAYS CAPITAL NOMINEES LIMI                         934,302
  BARCLAYS TRUST CO AS EXEC/ADM                          615
  BARCLAYSHARE NOMINEES LIMITED                          41,330
  BDFORDTTL-BCP01-NORTHERN TRUST   BDFORDTT              47,353
  BDUKEQTTL-N3YZ-STATE STREET      BDUKEQTT              10,446
  BEUREQTTL-N3B2-STATE STREET      BEUREQTT              8,621
  BLENTFUKQ-16344-CHASE MANHATTA   BLENTFUK              400,264
  BLENTPUKQ-16345-CHASE MANHATTA   BLENTPUK              742,167
  BLEQFDUKQ-16331-CHASE MANHATTA   BLEQFDUK              246,435
  BLEQPTUEA-16341-CHASE MANHATTA   BLEQPTUE              1,964,545
  BLEQPTUKQ-16341-CHASE MANHATTA   BLEQPTUK              650,710
  BLFEDRTTL-28269-CHASE NOMINEES   BLFEDRTT              122,407
  BLFEPDTTL-28270-CHASE NOMINEES   BLFEPDTT              716,067
  BLFEPDUKQ-28270-CHASE NOMINEES   BLFEPDUK              270,467
  BLUKINTTL-16400-CHASE MANHATTA   BLUKINTT              8,433,668
  BRKSPFTTL-813168-MIDLAND BANK    BRKSPFTT              926,308
  BUCAPTUEA-19503-CHASE MANHATTA   BUCAPTUE              258,537
  BUCAPTUKQ-19503-CHASE MANHATTA   BUCAPTUK              124,989
  BUDISTUKA-19514-CHASE MANHATTA   BUDISTUK              128,618
  BUEXINTTL-19520-CHASE MANHATTA   BUEXINTT              480,956
  BUFIVE350-19508-CHASE MANHATTA   BUFIVE35              1,145,581
  BUGENRTTL-19507-CHASE MANHATTA   BUGENRTT              319,061
  BUGENRUEA-19507-CHASE MANHATTA   BUGENRUE              785,257
  BUINCM350-19505-CHASE MANHATTA   BUINCM35              209,020
  BUINCMTTL-19505-CHASE MANHATTA   BUINCMTT              138,568
  BUINVFTTL-19518-CHASE MANHATTA   BUINVFTT              662,812
  BUKEQUTTL-N3B6-STATE STREET      BUKEQUTT              316,270
  BUSPCSUKQ-19519-CHASE MANHATTA   BUSPCSUK              2,652,018
  BUTRSFTTL-19512-CHASE MANHATTA   BUTRSFTT              40,008
  CAAPENTTL-CVS21-NORTHERN TRUST   CAAPENTT              1,692,992
  CEULIPTTL-367748-BANK OF NEW Y   CEULIPTT              3,599,470
  CHATRKTTL-16376-CHASE MANHATTA   CHATRKTT              475,611
  CHRSTHUKX-16621-CHASE MANHATTA   CHRSTHUK              186,353
  CHUCOMTTL-31961-CHASE NOMINEES   CHUCOMTT              1,347,971
  CLTWORTTL-392177-BANK OF NEW Y   CLTWORTT              313,638
  COUEUKTTL-392067-BANK OF NEW Y   COUEUKTT              4,526,598
  DENTSTUKA-16644-CHASE MANHATTA   DENTSTUK              420,978
  DUNSWRUKA-16612-CHASE MANHATTA   DUNSWRUK              154,621
  DYFEDXUKA-772823-MIDLAND BANK    DYFEDXUK              1,951,762
  ESBSUPTTL-218311-BANK OF NEW Y   ESBSUPTT              43,074
  FFP350TTL-221476-BNY (OCS) NOM   FFP350TT              252,149
  FFPONGTTL-221428-BANK OF NEW Y   FFPONGTT              524,342
  FKRUSSTTL-501562755-BANKERS TR   FKRUSSTT              2,023,638
  FRNUKQTTL-501575013-BANKERS TR   FRNUKQTT              378,406
  GMITRNTTL-25772-CHASE MANHATTA   GMITRNTT              595,609
  INVESTORS BANK AND TRUST CO.     527191                3,056,084
  INVESTORS BANK AND TRUST CO.     536747                756,438
  INVESTORS BANK AND TRUST CO.     552942                355,221
  INVESTORS BANK AND TRUST CO.     573039                101,088
  INVESTORS BANK AND TRUST CO.     585934                10,802
  INVESTORS BANK AND TRUST CO.     595966                230,692
  JPMORGAN CHASE BANK              540186                181,647
  JPMORGAN CHASE BANK              BTGF01IE              341,021
  JPMORGAN CHASE BANK              BTGF05IE              381,288
  KIOGEQUKA-387173-BNY (OCS) NOM   KIOGEOUK              184,663
  MARKIPTTL-814537-MIDLAND BANK    MARKIPTT              80,198
  MARKUKTTL-814574-MIDLAND BANK    MARKUKTT              75,842
  NORTHERN TRUST BANK - BGI SEPA   581610                274,022
  NORTHERN TRUST BANK - BGI SEPA   584069                116,930
  NORTHERN TRUST BANK - BGI SEPA   604162                41,732
  NUFFOUTTL-TNF01-NORTRUST NOMIN   NUFFOUTT              329,159
  NUFGENUKA-16901-CHASE MANHATTA   NUFGENUK              127,521
  PGUKALTTL-613363-CITIBANK NA     PGUKALTT              519,989
  POWYSFTTL-16649-CHASE MANHATTA   POWYSFTT              41,844
  PPPMEDUKQ-8002238-DEUTSCHE BAN   PPPMEDUK              127,458
  PTMA11TTL-27717-CHASE NOMINEES   PTMA11TT              104,456
  R C GREIG NOMINEES LIMITED A/C   BL1                   159,633
  R C GREIG NOMINEES LIMITED A/C   CM1                   36,608
  R C GREIG NOMINEES LIMITED GP1   GP1                   15,218
  R C GREIG NOMINEES LIMITED SA1   SA1                   18,461
  ROYLIVTTL-LIV02-NORTRUST NOMIN   ROYLIVTT              854,383
  SCTPEQTLC-SCO06-NORTRUST NOMIN   SCTPEOTL              308,641
  STHWRKUKQ-16669-CHASE MANHATTA   STHWRKUK              63,310
  TORFAEUKQ-003002-MELLON NOMINE   TORFAEUK              84,024
  TPGEQUTTL-6948890986-CITIBANK    TPGEOUTT              184,937
  TRIBUNTTL-18243-CHASE MANHATTA   TRIBUNTT              127,489
  UNIAEQTTL-USF12-NORTHERN TRUST   UNIAEOTT              2,084,752
  UNLVERUKQ-USF06-NORTHERN TRUST   UNLVERUK              207,560
  WELLCOTTL-JD12-STATE STREET      WELLCOTT              447,165
  WINUKPTTL-6010640794-VIDACOS N   WINUKPTT              252,237
  WOOUSFTTL-214075-BANK OF NEW Y   WOOUSFTT              4,422,391
  ZEBAN NOMINEES LIMITED                                 1,700
  ZEBAN NOMINEES LIMITED                                 4,780
                                   TOTAL                 105,945,146

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

10 MARCH 2004

11. Date company informed

12 MARCH 2004

12. Total holding following this notification

105,945,146

13. Total percentage holding of issued class following this notification

11.17%

14. Any additional information

NOTIFICATION RECEIVED PURSUANT TO S198-202 COMPANIES ACT 1985 THAT THE SHAREHOLDER NAMED IN 2 ABOVE HAS INCREASED THEIR SHAREHOLDING IN SPIRENT PLC TO 11.17%. SHAREHOLDER PREVIOUSLY REPORTED A SHAREHOLDING OF 95,500,218 SHARES (10.07%) ON 16 FEBRUARY 2004.

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

12 MARCH 2004

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

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