Holding in Company

Spirent PLC
12 December 2001


                  DEALINGS BY SUBSTANTIAL SHAREHOLDERS


1)   NAME OF COMPANY

SPIRENT PLC

2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST

IAIN MILNES

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.

SHAREHOLDER IN 2 ABOVE

5)   Number of shares/amount of stock acquired.

NIL

6)   ( N/A %) of issued Class

NOT APPLICABLE

7)   Number of shares/amount of stock disposed

15,143,441

8)   (1.62%) of issued Class

9)   Class of security

ORDINARY SHARES OF 3 1/3P EACH

10)  Date of transaction

11 DECEMBER 2001

11)  Date company informed

11 DECEMBER 2001

12)  Total holding following this notification

19,866,137
               
13)  Total percentage holding of issued class following this notification

2.13%

14)  Any additional information

MR MILNE'S SHAREHOLDING IS NOW BELOW 3% OF THE COMPANY'S ISSUED CAPITAL

15)  Name of contact and telephone number for queries

J E GOMM - 01293 767656

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

     Date of Notification 12 DECEMBER 2001