Holding in Company

Spirent PLC
7 November 2001

London Stock Exchange

                  NOTIFICATION OF MAJOR INTERESTS IN SHARES




All relevant boxes should be completed in block capital letters

1 Name of company                                  2 Name of shareholder having
                                                     a major interest

                                                     Legal & General Investment
  SPIRENT plc                                        Management Limited


3 Please state whether notification indicates that 4 Name of the registered
  it is in respect of holding of the shareholder     holder(s) and, if more
  named in 2 above or                                than one holder, the
                                                     number of shares held by   
                                                     each of them

  in respect of a non-beneficial interest or in      HSBC Global Custody
  the case of an individual holder if it is a        Nominee a/c 775229 70,000
  holding of that person's spouse or children
  under the age of 18                                HSBC Global Custody
                                                     Nominee a/c 886603
                                                     3,948,833

                                                     HSBC Global Custody
                                                     Nominee a/c 775245
  SHAREHOLDER IN 2 ABOVE                             4,193,181

                                                     HSBC Global Custody
                                                     Nominee a/c 754612 145,000

                                                     HSBC Global Custody
                                                     Nominee a/c 360509 539,214

                                                     HSBC Global Custody
                                                     Nominee a/c 357206
                                                     18,858,934

                                                     HSBC Global Custody
                                                     Nominee a/c 866197 58,116

                                                     HSBC Global Custody
                                                     Nominee a/c 130007 331,775

                                                     28,145,053




5 Number of shares   6 Percentage   7 Number of shares   8 Percentage of
  / amount of          of Issued    /amount of stock       Issued Class
  stock acquired       Class        disposed
                                              
  560,000             0.0601%         -                    -



9  Class of     10 Date of transaction                11 Date company informed
   security
                   5 November 2001                       6 November 2001
   ORDINARY
   SHARES OF 3
   1/3p EACH

12 Total        13 Total percentage holding of issued class following this
   holding         notification
   following
   this            3.0217%
   notification


   28,145,053




14 Any additional            15 Name of contact and telephone number for
   information                  queries

   NOTIFICATION IN
   ACCORDANCE WITH S.198-202
   COMPANIES ACT 1985 THAT A    JOSEPHINE GOMM - 01293 767656
   SHAREHOLDER HAS A
   NOTIFIABLE INTEREST. THIS
   NOTIFICATION FOLLOWS THE
   ACQUISITION OF 560,000
   ORDINARY SHARES IN
   SPIRENT PLC ON 5 NOVEMBER
   2001.

16 Name and signature of
   authorised company
   official

   Responsible for making
   this notification              Josephine E Gomm, Assistant Company Secretary




   Date of notification 

   7 November 2001

London Stock Exchange, Company Announcements Office, Old Broad Street, London
EC2N 1HP

Facsimile: 020 7588 6057, 020 7334 8964/8965/8966 (PLEASE DO NOT POST)

Enquries: Continuing Obligations: Telephone: [phone]