Holding(s) in Company

Spirent PLC
1 October 2002


                  DEALINGS BY SUBSTANTIAL SHAREHOLDERS


1)   NAME OF COMPANY

     SPIRENT PLC

2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST

     AVIVA PLC (FORMERLY CGNU 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.



5)   Number of shares/amount of stock acquired.

     9,800,872

6)   (1.04%) of issued Class

7)   Number of shares/amount of stock disposed



8)   ( N/A %) of issued Class

9)   Class of security

     ORDINARY SHARES OF 3 1/3P EACH

10)  Date of transaction

     27 SEPTEMBER 2002

11)  Date company informed

     1 OCTOBER 2002

12)  Total holding following this notification

     50,490,874
               
13)  Total percentage holding of issued class following this notification

     5.37%

14)  Any additional information

     NOTIFICATION IN ACCORDANCE WITH S.198-202 COMPANIES ACT 1985

15)  Name of contact and telephone number for queries

     L THOMAS - 01293 767658

16)  Name and signature of authorised company official responsible for 
     making this notification

     Date of Notification ....1 OCTOBER 2002.......


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