Holding(s) in Company

Spirent PLC 21 February 2003 London Stock Exchange NOTIFICATION OF MAJOR INTERESTS IN SHARES 1 Name of company 2 Name of shareholder having a major interest SPIRENT plc FMR Corp. and Fidelity International Limited 3 Please state whether notification indicates that it is in 4 Name of the registered holder(s) and, if more than one holder, the number of shares held by respect of holding of the shareholder named in 2 above or each of them in respect of a non-beneficial interest or in the case of Chase Nominees Ltd (FMRCO) 8,717,800 an individual holder if it is a holding of that person's spouse or children under the age of 18 State Street Nominees Ltd (FMRCO) 428,300 Companies named in box 2 above and their direct and State Street Bank & Trust Company (FMRCO) indirect subsidiaries, being non-beneficial holders 16,310,700 State Street Bank & Trust (FMTC) 3,137,900 Chase Manhattan Bank London (FISL) 12,563,179 HSBC (FPM) 619,700 Chase Nominees Ltd (FPM) 7,032,896 Northern Trust (FPM) 2,040,200 Chase Manhattan Bank London (FIL) 1,111,725 Bank of New York Brussels (FIL) 805,100 Northern Trust (FIL) 3,044,100 Chase Nominees Ltd (FIL) 9,979,540 Bank of New York London (FIL) 5,006,000 Nortrust Nominees Ltd (FIL) 3,107,200 State Street Bank & Trust (FIL) 296,400 HSBC Client Holdings Nominee (UK) Ltd (FIL) 10,014,400 FMRCO - Fidelity Management & Research Company FMTC - Fidelity Management Trust Company FISL - Fidelity Investment Services Ltd FPM - Fidelity Pension Management FIL - Fidelity International Ltd 5 Number of shares 6 Percentage of 7 Number of shares 8 Percentage of Issued / amount of Issued /amount of stock Class stock acquired Class disposed 17,797,468 1.89% N/a N/a 9 Class of security 10 Date of transaction 11 Date company informed ORDINARY SHARES OF 3 1/3p EACH Not notified 20 February 2003 12 Total holding following this notification 13 Total percentage holding of issued class following this notification 84,215,140 8.93% 14 Any additional information 15 Name of contact and telephone number for queries Luke Thomas - 01293 767658 16 Name and signature of authorised company official responsible for making this notification Luke Thomas, Deputy Company Secretary, Spirent plc Date of notification 21 February 2003 London Stock Exchange, Company Announcements Office, Old Broad Street, London EC2N 1HP Facsimile: 0207 588 6057, 0207 334 8964/8965/8966 (PLEASE DO NOT POST) Enquries: Continuing Obligations: Telephone: 0207 797 3850/1639/1972/3150 This information is provided by RNS The company news service from the London Stock Exchange BKDFBB
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