RNS Number:6878N
Spirent PLC
17 July 2003

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES


1. Name of company

Spirent plc

2. Name of shareholder having a major interest

Prudential 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

Not known

5. Number of shares / amount of stock acquired

N/A

6. Percentage of issued class

N/A

7. Number of shares / amount of stock disposed

Not known

8. Percentage of issued class

Not known

9. Class of security

Ordinary shares of 3.3333 pence each

10. Date of transaction

Not known


11. Date company informed

17 July 2003

12. Total holding following this notification

Not known

13. Total percentage holding of issued class following this notification

Not known

14. Any additional information

In accordance with s198 to 202 Companies Act 1985 (as amended) Spirent plc has
received notification from Prudential plc that they no longer have a notifiable
interest in the issued share capital of our Company.

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

17 July 2003



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