Directorate Change

Spirent Communications PLC
15 June 2007

                           SPIRENT COMMUNICATIONS PLC

                 DUNCAN LEWIS APPOINTED NON-EXECUTIVE DIRECTOR



London, UK - 15 June 2007: Spirent Communications plc ("Spirent" or "the Company
") (LSE: SPT), a leading communications technology company, today announces that
Duncan Lewis will be appointed as a non-executive director with effect from 1
July 2007 and will become a member of the Remuneration and Nomination
Committees.

Duncan Lewis is currently Senior Advisor in Telecommunications, Media and
Technology at The Carlyle Group.  With several previous senior executive roles
in the telecommunications industry, most notably with Equant, Global Telesystems
("GTS"), British Telecom ("BT") and Cable & Wireless, Duncan brings a wealth of
telecommunications experience to Spirent.

Prior to joining The Carlyle Group, he served as Chief Executive Officer and
President of GTS/Ebone, which, at the time, operated Europe's largest optical
and IP network carrying more than 25 per cent of Europe's Internet traffic.
Duncan was also Managing Director of Equant NV, the world's largest global data
network exclusively serving multinational companies prior to its sale to France
Telecom.  Before Equant, Duncan was Chief Executive Officer at Granada Media
Group and Mercury Communications.  He also held various other senior roles at
Cable & Wireless and BT.  Duncan studied at Cambridge University after serving
in Senegal for Voluntary Service Overseas.  He was also a visiting Professor of
Business Management at Strathclyde University.



Commenting on Duncan's appointment, Edward Bramson, Chairman of Spirent, said:



"We are delighted to have Duncan joining the Spirent Board.  He has a wealth of
experience in the telecommunications industry and will undoubtedly be a
significant asset as the Company continues to go through a period of transition
and beyond."



The following information is disclosed in accordance with the UKLA Listing
Rules, paragraph 9.6.13R (1) to 9.6.13R (6) and the UKLA Disclosure Rules,
paragraph 3.1.4R:



     Directorships of Publicly Quoted Companies held in the last 5 years :

                          Viridian Group plc (Note 1)

                          Completel Europe NV (Note 2)

        Interests in Spirent securities (ordinary shares of 3 & 1/3p) :

                                      None

Notes

1 This Company is no longer publicly quoted and Mr Lewis's directorship ceased
in 2006.

2 This Company has a listing on Euronext Paris and Mr Lewis is a member of the
Supervisory Board.



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

                                    - ends -



Enquiries
Eric Hutchinson, Chief Financial Officer     Spirent Communications plc  [phone]
Paul Eardley, Company Secretary & General
Counsel

Andrew Dowler/Harriet Keen                   Financial Dynamics          [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).  The Company operates a Level 1 American Depositary
Receipt ("ADR") programme with each ADR representing four Spirent Communications
plc Ordinary shares.  The ADRs trade in the US over-the-counter ("OTC") market
under the symbol SPMYY and the CUSIP number is 84856M209.

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 document may contain forward-looking statements which are made in good
faith and are 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 document,
whether as a result of new information, future events or otherwise.


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            The company news service from the London Stock Exchange