Holding(s) in Company

Spirent PLC
25 April 2006

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES



1. Name of listed company


SPIRENT PLC



2. Name of shareholder with a major interest


BARCLAYS PLC



3. Please state whether notification indicates that regarding the holding of the
shareholder named in 2 above; 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


-



6. Percentage of issued class (any treasury shares held by the listed company
should not be taken into account when calculating percentage)


-



7. Number of shares / amount of stock disposed


NOT KNOWN



8. Percentage of issued class (any treasury shares held by the listed company
should not be taken into account when calculating percentage)


NOT KNOWN



9. Class of security


ORDINARY SHARES OF 3.3333 PENCE EACH



10. Date of transaction


HOLDING AS AT 21 APRIL 2006



11. Date company informed


25 APRIL 2006





12. Total holding following this notification


NOT KNOWN



13. Total percentage holding of issued class following this notification (any
treasury shares held by the listed company should not be taken into account when
calculating percentage)


NOT KNOWN



14. Any additional information


NOTIFICATION IN ACCORDANCE WITH S.198-202 COMPANIES ACT 1985 THAT THE
SHAREHOLDER IN 2 ABOVE NO LONGER HAS A NOTIFIABLE INTEREST.  SHAREHOLDER
PREVIOUSLY REPORTED A SHAREHOLDING OF 46,516,530 (4.80%) ON 13 APRIL 2006.


15. Name of contact and telephone number for queries


MICHAEL ANSCOMBE - 01293 767672



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


MICHAEL ANSCOMBE - DEPUTY COMPANY SECRETARY



Date of notification


25 APRIL 2006






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