Restructuring of Division

Spirent PLC
29 June 2005


                                  SPIRENT PLC

                  Restructuring of Service Assurance division

London, UK - 29 June 2005: Spirent plc (LSE: SPT; NYSE: SPM), a leading
communications technology company, today announces a further restructuring
within the Service Assurance division. The restructuring will realign resources
and further reduce operating costs while the business continues to be
transitioned towards IP service assurance. It will also allow support for
existing leased line monitoring customers to be provided on a more efficient
basis. The strategy for this division is to deliver service assurance solutions
for IP business services and residential triple play offerings, including voice,
video and data, as well as DSL and field test solutions.

As part of the restructuring, headcount in the division is being reduced by 180,
representing 30 per cent of the workforce. The restructuring is expected to
result in annualised cost savings of approximately £8 million, of which 
£3 million will benefit the second half of this financial year. The 
restructuring will give rise to a one time charge of approximately £2 million, 
of which an estimated £1.3 million will be in cash, in the first half of 2005. 
This is in addition to the approximately £3 million charge announced in our 
trading update of 21 April 2005. As previously announced, the Service Assurance 
division is expected to report an operating loss, before the one time charges, 
in the region of £10 million in the first half of 2005 under International 
Financial Reporting Standards.

The costs associated with the initiative to rationalise the supply chain
activities across Spirent Communications have now been quantified. It is
expected that the actions will result in a one time charge in the second half of
the year of approximately £3 million, of which £1 million will be in cash.

Anders Gustafsson, Chief Executive, said:

'We have taken further actions in the Service Assurance division to realign the
cost base while we continue to transition the business towards IP service
assurance. We believe that the advanced voice, video and data services that are
being rolled out by service providers worldwide will require sophisticated
monitoring to ensure the high quality, reliable services their customers have
come to expect. Our solutions address the challenges of delivering these
advanced services.'

Note

The above disclosures are unaudited and are reported on the basis of
International Financial Reporting Standards (IFRS).

Business segments reported under IFRS are the same as those reported under UK
GAAP however the operating profit or loss is affected by the stricter
definitions under IFRS regarding allocation of central costs. Those shared
costs, which cannot be directly attributed to individual segments, will now be
reported separately as corporate and other costs. Where appropriate comparative
numbers have been restated to reflect this change.

                                    - ends -

Enquiries

Anders Gustafsson, Chief Executive    Spirent plc      [phone]
Eric Hutchinson, Finance Director

Investor Relations

Catherine Nash                        Spirent plc      [phone]

Media

Tom Buchanan/Rupert Young             Brunswick        [phone]


About Spirent

Spirent 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. Our Network Products business is a developer and
manufacturer of innovative solutions for fastening, identification, protection
and connectivity in electrical and communications networks marketed under the
global brand HellermannTyton. The Systems group comprises PG Drives Technology
which develops power control systems for specialist electrical vehicles in the
mobility and industrial markets. Further information about Spirent plc can be
found at www.spirent.com

Spirent 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
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. Such factors include, but are not limited to: the extent to which
customers continue to invest in next-generation technology and deploy advanced
IP-based services; our ability to successfully expand our customer base; our
ability to continue to benefit from generally improving market conditions; the
prevailing market conditions and pace of economic recovery; our ability to
improve efficiency and adapt to economic changes and other changes in demand or
market conditions; our ability to develop and commercialise new products and
services, extend our existing capabilities in IP services and expand our product
offering internationally; our ability to attract and retain qualified personnel;
the effects of competition on our business; fluctuations in exchange rates and
heavy exposure to a weak US dollar; changes in the business, financial condition
or prospects of one or more of our major customers; risks of doing business
internationally; the financial burden of our pension fund deficit; risks
relating to the acquisition or sale of businesses and our subsequent ability to
integrate businesses; our reliance on proprietary technology; our exposure to
liabilities for product defects; our reliance on third party manufacturers and
suppliers; and other risks described from time to time in Spirent plc's
Securities and Exchange Commission periodic reports and filings. 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
      EPBRGDLBGDGGUI