Trading Statement

805 - 2 July 2002

                                  Spirent plc                                  

                                Trading Update                                 

Spirent plc (LSE: SPT; NYSE: SPM), a leading international network technology
company, announces that it expects to report a modest improvement in revenues
and return on sales generated by ongoing businesses in the first half of 2002
compared with the second half of 2001.

The performance for the first half of 2002 has been achieved through the
introduction of new products and the development of new markets against a
background of continuing difficult market conditions.

The company plans to announce its interim results for the first half of 2002 on
28 August 2002.

                                   - ends -                                    

Enquiries

Nicholas Brookes, Chief Executive Spirent plc            [phone]    
                                                                               
Eric Hutchinson, Finance Director                                              
                                                                               
Investor Relations                                                             
                                                                               
Catherine Nash                    Spirent plc            [phone]    
                                                                               
Media                                                                          
                                                                               
Jon Coles/Rupert Young            Brunswick (London)     [phone]   
                                                                               
Lauren Teggelaar                  Brunswick (New York)   [phone]       

About Spirent

Spirent plc is an international network technology company providing
state-of-the-art solutions with a focus on high growth activities. Our
Communications group unites leading edge performance analysis technology with
network operations expertise, enabling customers to accelerate the development,
deployment and assurance of next generation network equipment and services
worldwide. Further information about Spirent plc can be found at 
www.spirent.com

Spirent plc is listed on the London Stock Exchange (ticker: SPT) and on the New
York Stock Exchange (ticker: SPM; CUSIP number: 84856M209) with one American
Depositary Receipt representing four Ordinary shares.

Spirent and the Spirent logo are trademarks of Spirent plc. All rights
reserved.

This press release may contain forward-looking statements that are based on
current expectations or beliefs, as well as assumptions about future events.
You can identify these statements by their use of words such as 'will,'
'anticipate,' 'estimate,' 'expect,' 'project,' 'intend,' 'plan,' 'should,'
'may,' 'assume' and other similar words. You should not place undue reliance on
our 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: aggressive competition; our ability to develop and commercialize new
products and services; risks relating to the acquisition or sale of businesses;
our reliance on third party manufacturers and suppliers; our exposure to
liabilities for product defects; our reliance on proprietary technology; our
ability to grow in e-commerce; our ability to attract and retain qualified
personnel; risks of doing business internationally; and risks of downturns in
the industries in which we participate; and other risks described from time to
time in Spirent plc's Securities and Exchange Commission periodic reports and
filings. We undertake no obligation to update our forward-looking statements,
whether as a result of new information, future events or otherwise.