Analysts Presentation Day

Spirent PLC
6 December 2000


                                                       777 - 6 December 2000

                          SPIRENT PLC INVESTOR DAY

Spirent plc, the international network technology company, is today hosting
a presentation day for analysts, investors and lenders to provide further
detail on its strategic development and products.   These plans and products
have been set out previously in Spirent's annual report and accounts,
interim report and the prospectus dated 16 November 2000 concerning
Spirent's acquisition of Hekimian Laboratories Inc.

At this presentation, Spirent's Chief Executive Nicholas Brookes will also
reiterate the trading update given in the company's Hekimian acquisition
announcement, which is reproduced below:

'At the interim results presentation on 7 September 2000 Nicholas Brookes,
Chief Executive, of Spirent said: 'Given the increasing investment being
made by the telecommunications industry and the rapid pace of technological
change, Spirent is well positioned to take advantage of future market
potential. We look forward to a further strong performance during the second
half of the year and beyond.'

The second half trading to date has been in line with these performance
expectations. With the acquisitions of Zarak and Net-HOPPER in the second
half of this year, together with continued strong organic growth in the
Communications group, the company remains positive about Spirent's future.

The Board believes that the acquisition and subsequent integration of
Hekimian will create further opportunities for the enlarged group to compete
successfully in the network technology sectors which the company is
targeting, and an improved product offering should significantly enhance the
prospects of the business. Accordingly, the Board views the future prospects
of the enlarged group with confidence.'




Enquiries:
Nicholas Brookes, Chief Executive        Spirent plc     [phone]
Eric Hutchinson, Finance Director

Jon Coles/Rupert Young                   Brunswick       [phone]


Background note:

Spirent plc is an international network technology company providing state-
of-the-art solutions with a focus on high growth, high margin activities. It
is a world leader in advanced telecommunications testing systems and network
products. www.spirent.com

Spirent is a FTSE 100 company quoted on the London Stock Exchange (ticker
SPT) in the Information Technology Hardware sector.  The Company operates a
Level 1 American Depository Receipt programme (ticker: SPNUY; CUSIP number:
84856M100).  For information, contact Brian Heston, The Bank of New York,
American Depositary Receipts, 101 Barclay St, 22 West, New York, NY 10286
Phone: [phone], Fax:  [phone], email:  [e-mail]
web site: www.adrbny.com