Holding(s) in Company

Spirent PLC
04 April 2005

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES



1. Name of company


SPIRENT PLC



2. Name of shareholder having a major interest


DEUTSCHE BANK AG



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


UNKNOWN



6. Percentage of issued class


UNKNOWN





7. Number of shares / amount of stock disposed


-



8. Percentage of issued class


-



9. Class of security


ORDINARY SHARES OF 3.3333 PENCE EACH



10. Date of transaction


NOT NOTIFIED



11. Date company informed


1 APRIL 2005





12. Total holding following this notification


42,245,524



13. Total percentage holding of issued class following this notification


4.39%



14. Any additional information






15. Name of contact and telephone number for queries


MICHAEL ANSCOMBE - 01293 767672



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


MICHAEL ANSCOMBE - ASSISTANT COMPANY SECRETARY



Date of notification


1 APRIL 2005



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