Holding(s) in Company

Spirent PLC
28 October 2003

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES



1. Name of company



Spirent plc



2. Name of shareholder having a major interest


Legal & General Investment Management Limited




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


HSBC Global Custody Nominee (UK) Ltd A/C 914945                     361,104

HSBC Global Custody Nominee (UK) Ltd A/C 775245                   4,231,340

HSBC Global Custody Nominee (UK) Ltd A/C 357206                  18,743,619

HSBC Global Custody Nominee (UK) Ltd A/C 866203                   1,280,000

HSBC Global Custody Nominee (UK) Ltd A/C 360509                   1,304,014
Total:                                                           25,920,077




5. Number of shares / amount of stock acquired


Not applicable




6. Percentage of issued class


Not applicable




7. Number of shares / amount of stock disposed


Not known




8. Percentage of issued class


Not known




9. Class of security



Ordinary Shares of 3.33333 pence each





10. Date of transaction


24 October 2003




11. Date company informed


28 October 2003




12. Total holding following this notification



See 14 below



13. Total percentage holding of issued class following this notification



See 14 below



14. Any additional information


Notification received that following the disposal of a number of shares, the
shareholder holds less than three percent of the Company's issued share capital
and therefore no longer has a notifiable interest under s198 - s202 of the
Companies Act 1985.



15. Name of contact and telephone number for queries


Luke Thomas, Deputy Secretary, Spirent plc [phone]




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


Luke Thomas, Deputy Secretary, Spirent plc






Date of notification



28 October 2003





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