SOURCE: Spirent PLC

July 13, 2005 05:03 ET

SPIRENT PLC - NOTICE OF RESULTS

Crawley, UK -- (MARKET WIRE) -- July 13, 2005 --


                               SPIRENT PLC

                  NOTIFICATION OF DATE OF 2005 INTERIM RESULTS

London, UK - 13 July 2005: Spirent plc (LSE: SPT; NYSE: SPM), a leading communications technology company, announces that it intends to release its interim results for the first half of 2005 on Thursday 11 August 2005 before the opening of the UK market.

The Company will host a results presentation at 09.00 UK time on Thursday 11 August 2005. A simultaneous webcast of the presentation will be available on the Spirent plc website at www.spirent.com.

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Enquiries

Investor Relations

Catherine Nash     Spirent plc                     +44 (0)1293 767676

Media

Reg Hoare          Smithfield                     +44 (0)20 7360 4900

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 that are based on current expectations or beliefs, as well as assumptions about future events. By their nature, forward-looking statements are inherently predictive, 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. These risks include the 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.


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