Director Declaration

Spirent Communications PLC
03 January 2007

                           SPIRENT COMMUNICATIONS PLC

                             DIRECTOR DECLARATIONS



London, UK - 3 January 2007: Spirent Communications plc ("the Company") (LSE:
SPT; NYSE: SPM), a leading technology communications company, announces that
following the appointment of the directors named below, the following
information is disclosed pursuant to paragraph 9.6.13R of the UK Listing Rules
and paragraph 3.1.4R of the UK Disclosure Rules:


Director              Directorships of Publicly        Interests in the Company's       Nature of interest in the
                     Quoted Companies held in the      securities (ordinary shares        Company's securities
                             last 5 years                     of 3 & 1/3p)


Edward Bramson           4 Imprint Group plc                                20,000             Beneficial owner 
                        Elementis plc Note 1                           130,250,000                   See note 2
                     Ampex Corporation (US)Note 1                       


Ian Brindle           4 Imprint Group plc Note 1                             4,525                   See note 3
                         Elementis plc Note 1


Gerard Eastman                   None                                  130,250,000                   See note 2


Alexander Walker          Rotork plc Note 1                                   None                          N/A
                        Yule Catto & Co Public
                           Limited Company

Notes:

1. The directorship is current.

2. This holding is a connected interest by way of the director being a member of
Sherborne Investors GP, LLC, which is the general partner of Sherborne
Investors, LP.  Sherborne Investors, LP is the managing member of each of the
following funds, which are the beneficial owners of the following ordinary
shares: Hanover Strategic Fund A, LLC (29,644,000 ordinary shares); Hanover
Strategic Fund B, LLC (14,075,887 ordinary shares); Hayden Investor Partners,
LLC (45,685,845 ordinary shares); Hayden Investor Partners II, LLC (40,844,268
ordinary shares).

3. The holding is through a connected person, Mrs F E Brindle (spouse). No
shares are held in the name of Mr I Brindle.



The Company confirms that that there are no other matters requiring disclosure
in relation to UK Listing Rule 9.6.13R.

                                    - ends -

Enquiries
  Paul Eardley    Company Secretary & General Counsel       [phone]





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 www.spirent.com.

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.


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