Crawley, UK -- (MARKET WIRE) -- March 8, 2007 --

Thursday 8 March

                                 SPIRENT COMMUNICATIONS PLC

                                   APPOINTMENT OF BROKERS

London, UK - 8 March 2007 - Spirent Communications plc (LSE: SPT; NYSE: SPM), a
leading communications technology company, today announced that the Board has
appointed UBS Investment Bank and Hoare Govett Limited as joint brokers and
advisers to the Company, replacing the existing brokers and advisers.

                                    - ends -

Eric Hutchinson, Chief Financial Officer
Spirent Communications plc                +44 (0)1293 767676
Andrew Dowler/Harriet Keen          
Financial Dynamics                        +44 (0)20 7831 3113

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
customers 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