Crawley, UK -- (MARKET WIRE) -- December 22, 2006 --

                      SPIRENT COMMUNICATIONS PLC


London, UK - 22 December 2006: Spirent Communications plc ("Spirent" or "the
Company") (LSE: SPT; NYSE: SPM), a leading technology communications company,
today held an Extraordinary General Meeting ("EGM") which had been requisitioned
by a nominee on behalf of funds managed by New York based Sherborne Investors,
Artemis Investment Management and Credit Suisse Asset Management. Each of the
resolutions was duly passed by the required majority.

Consequently John Weston, Andrew Given and Fred D'Alessio are no long directors
of the Company and Edward Bramson, Ian Brindle, Gerard L. Eastman Jr. and
Alexander Walker have been appointed directors of the Company. In addition, at
the conclusion of the EGM Marcus Beresford and Kurt Hellstrom resigned as
Directors. A further announcement will be made in due course regarding the
composition of the Board and the roles, functions and responsibilities of each

The number of votes cast on each of the resolutions will be announced later
today and will also be posted on the Company's website ( The
Company will submit to the UK Listing Authority a document containing the above
resolutions passed at the EGM in compliance with the Listing Rules. The UK
Listing Authority has informed the Company that this document will not be
available for viewing at their Document Viewing Facility until Wednesday, 27
December at the following address:

UK Listing Authority
Financial Services Authority
25 The North Colonnade
Canary Wharf
E14 5HS

Tel: (0) 20 7066 1000

                                    - ends -


Reg Hoare          Smithfield             +44 (0)20 7360 4900

About Spirent Communications plc

Spirent Communications plc is a leading communications technology company
focused on delivering innovative systems and services to meet the needs of cus
tomers worldwide. We are a global provider of performance analysis and service
assurance solutions that enable the development and deployment of
next-generation networking technologies such as broadband services, Internet
telephony, 3G wireless and web applications and security testing. The Systems
group develops power control systems for specialist electrical vehicles in the
mobility and industrial markets. Further information about Spirent
Communications plc can be found at

Spirent Communications plc Ordinary shares are traded on the London Stock
Exchange (ticker: SPT) and on the New York Stock Exchange (ticker: SPM; CUSIP
number: 84856M209) in the form of American Depositary Shares ("ADS"),
represented by American Depositary Receipts, with one ADS representing four
Ordinary shares.

Spirent and the Spirent logo are trademarks or registered trademarks of Spirent
Communications plc. All other trademarks or registered trademarks mentioned
herein are held by their respective companies. All rights reserved.

This press release may contain forward-looking statements (as that term is
defined in the United States Private Securities Litigation Reform Act of 1995)
based on current expectations or beliefs, as well as assumptions about future
events. You can sometimes, but not always, identify these statements by the use
of a date in the future or such words as "will", "anticipate", "estimate",
"expect", "project", "intend", "plan", "should", "may", "assume" and other
similar words. By their nature, forward-looking statements are inherently
predictive and speculative and involve risk and uncertainty because they relate
to events and depend on circumstances that will occur in the future. You should
not place undue reliance on these forward-looking statements, which are not a
guarantee of future performance and are subject to factors that could cause our
actual results to differ materially from those expressed or implied by these
statements. The Company undertakes no obligation to update any forward-looking
statements contained in this press release, whether as a result of new
information, future events or otherwise.

                      This information is provided by RNS
            The company news service from the London Stock Exchange