UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April, 2007 SPIRENT COMMUNICATIONS plc _____________________________________________________________________ (Translation of registrant's name into English) Spirent House, Crawley Business Quarter, Fleming Way, Crawley, West Sussex RH10 9QL, UK. _____________________________________________________________________ (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. Form 20-F X Form 40-F..... Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes ..... No X If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- ________ Spirent Communciations plc (the "Company") Annual Information Update 2 April 2007 In accordance with Section 5.2 of the Prospectus Rules, the Company submits its Annual Information Update which refers to information that has been published or made available to the public in the 12 months up to and including 30 March 2007. In accordance with the provisions of Article 27(3) of the Prospectus Directive Regulation, it is acknowledged that some of the information referred to in this update was up to date at the time the information was published but may now be out of date. Information is referred to in this update rather than included in full. 1. Announcements listed below were published via a Regulatory Information Service. Date Headline 30/03/2007 Transaction in Own Shares 30/03/2007 Annual Report and Accounts 29/03/2007 Transaction in Own Shares 29/03/2007 Director/PDMR Shareholding 28/03/2007 Transaction in Own Shares 28/03/2007 Transaction in Own Shares 27/03/2007 Transactions in Own Shares 27/03/2007 Holding(s) in Company 22/03/2007 Holding(s) in Company 21/03/2007 Transaction in Own Shares 20/03/3007 Transaction in Own Shares 15/03/2007 Director/PDMR Shareholding 14/03/2007 Holding(s) in Company 13/03/2007 Director/PDMR Shareholding 08/03/2007 Appointment of Brokets 08/03/2007 Board Change 07/03/2007 Additional Listing 06/03/2007 Cancellation of Shares 02/03/2007 Total Voting Rights 01/03/2007 Final Results 21/02/2007 Director/PDMR Shareholding 20/02/2007 Holding(s) in Company 14/02/2007 Additional Listing 07/02/2007 Director/PDMR Shareholding 01/02/2007 Holding(s) in Company 01/02/2007 Total Voting Rights 30/01/2007 Director/PDMR Shareholding 29/01/2007 Holding(s) in Company 19/01/2007 Notice of Results 19/01/2007 Total Voting Rights 18/01/2007 Additional Listing 15/01/2007 Director/PDMR Shareholding 09/01/2007 Holding(s) in Company 09/01/2007 Blocklisting Interim Review 05/01/2007 Director/PDMR Shareholding 03/01/2007 Director Declaration 02/01/2007 Director/PDMR Shareholding 29/12/2006 Directorate Change 28/12/2006 Total Voting Rights 22/12/2006 Result of EGM - Votes Cast 22/12/2006 Result of EGM 21/12/2006 Director/PDMR Shareholding 15/12/2006 Director/PDMR Shareholding 11/12/2006 Circular Available 11/12/2006 Further EGM Circular 05/12/2006 Response to Sherborne 05/12/2006 Director/PDMR Shareholding 04/12/2006 Director PDMR Shareholding 29/11/2006 EGM Circular 29/11/2006 Notice of EGM 21/11/2006 Transaction in Own Shares 20/11/2006 Transaction in Own Shares 17/11/2006 EGM Statement 17/11/2006 Transaction in Own Shares 16/11/2006 Transaction in Own Shares 15/11/2006 Re Shareholder Proposal 10/11/2006 Transaction in Own Shares 09/11/2006 Transaction in Own Shares 08/11/2006 Transaction in Own Shares 07/11/2006 Transaction in Own Shares 02/11/2006 Transaction in Own Shares 02/11/2006 Transaction in Own Shares 01/11/2006 Transaction in Own Shares 31/10/2006 Transaction in Own Shares 25/10/2006 Transaction in Own Shares 24/10/2006 Transaction in Own Shares 23/10/2006 Transaction in Own Shares 20/10/2006 Transaction in Own Shares 19/10/2006 Transaction in Own Shares 19/10/2006 Director/PDMR Shareholding 19/10/2006 Additional Listing 17/10/2006 Transaction in Own Shares 16/10/2006 Transaction in Own Shares 13/10/2006 Transaction in Own Shrs-Amd 13/10/2006 Transaction in Own Shares 12/10/2006 Transaction in Own Shares 11/10/2006 Transaction in Own Shares 10/10/2006 Transaction in Own Shares 05/10/2006 Strategy & Trading Update 27/09/2006 Transaction in Own Shares 26/09/2006 Transaction in Own Shares 25/09/2006 Transaction in Own Shares 22/09/2006 Transaction in Own Shares 21/09/2006 Transaction in Own Shares 20/09/2006 Transaction in Own Shares 20/09/2006 Holding(s) in Company 19/09/2006 Transaction in Own Shares 18/09/2006 Transaction in Own Shares 15/09/2006 Transaction in Own Shares 14/09/2006 Transaction in Own Shares 13/09/2006 Transaction in Own Shares 12/09/2006 Transaction in Own Shares 11/09/2006 Transaction in Own Shares 08/09/2006 Transaction in Own Shares 08/09/2006 Director/PDMR Shareholding 07/09/2006 Transaction in Own Shares 06/09/2006 Transaction in Own Shares 05/09/2006 Transaction in Own Shares 04/09/2006 Transaction in Own Shares 01/09/2006 Transaction in Own Shares 31/08/2006 Transaction in Own Shares 31/08/2006 Holding(s) in Company 30/08/2006 Transaction in Own Shares 29/08/2006 Transaction in Own Shares 25/08/2006 Transaction in Own Shares 24/08/2006 Holding(s) in Company 24/08/2006 Doc re. (Interim Report 2006) 24/08/2006 Transaction in Own Shares 23/08/2006 Transaction in Own Shares 22/08/2006 Transaction in Own Shares 22/08/2006 Director/PDMR Shareholding 22/08/2006 Director/PDMR Shareholding 21/08/2006 Transaction in Own Shares 18/08/2006 Transaction in Own Shares 17/08/2006 Transaction in Own Shares 16/08/2006 Transaction in Own Shares 15/08/2006 Holding(s) in Company 14/08/2006 Transaction in Own Shares 14/08/2006 Director/PDMR Shareholding 10/08/2006 Acquisition 10/08/2006 Interim Results 08/08/2006 Holding(s) in Company 08/08/2006 Holding(s) in Company 03/08/2006 Transaction in Own Shares 02/08/2006 Transaction in Own Shares 01/08/2006 Transaction in Own Shares 31/07/2006 Transaction in Own Shares 28/07/2006 Transaction in Own Shares 28/07/2006 Blocklisting Interim Review 27/07/2006 Transaction in Own Shares 26/07/2006 Transaction in Own Shares 25/07/2006 Transaction in Own Shares 24/07/2006 Transaction in Own Shares 24/07/2006 Holding(s) in Company 21/07/2006 Transaction in Own Shares 21/07/2006 Holding(s) in Company 20/07/2006 Transaction in Own Shares 19/07/2006 Transaction in Own Shares 18/07/2006 Transaction in Own Shares 17/07/2006 Transaction in Own Shares 14/07/2006 Transaction in Own Shares 13/07/2006 Transaction in Own Shares 12/07/2006 Transaction in Own Shares 12/07/2006 Holding(s) in Company 11/07/2006 Transaction in Own Shares 10/07/2006 Transaction in Own Shares 10/07/2006 Acquisition 07/07/2006 Transaction in Own Shares 06/07/2006 Transaction in Own Shares 05/07/2006 Transaction in Own Shares 04/07/2006 Transaction in Own Shares 04/07/2006 Holding(s) in Company 03/07/2006 Transaction in Own Shares 30/06/2006 Transaction in Own Shares 30/06/2006 Transaction in Own Shares 30/06/2006 Director/PDMR Shareholding 29/06/2006 Transaction in Own Shares 29/06/2006 Restructuring Actions 23/06/2006 Transaction in Own Shares 22/06/2006 Transaction in Own Shares 21/06/2006 Transaction in Own Shares 21/06/2006 Transaction in Own Shares 20/06/2006 Transaction in Own Shares 19/06/2006 Transaction in Own Shares 16/06/2006 Transaction in Own Shares 15/06/2006 Transaction in Own Shares 14/06/2006 Transaction in Own Shares 14/06/2006 Trading Statement 09/06/2006 Transaction in Own Shares 08/06/2006 Transaction in Own Shares 07/06/2006 Transaction in Own Shares 07/06/2006 Director/PDMR Shareholding 06/06/2006 Transaction in Own Shares 31/05/2006 Director/PDMR Shareholding 30/05/2006 Transaction in Own Shares 25/05/2006 Transaction in Own Shares 22/05/2006 Transaction in Own Shares 18/05/2006 Transaction in Own Shares 17/05/2006 Transaction in Own Shares 16/05/2006 Transaction in Own Shares 15/05/2006 Transaction in Own Shares 08/05/2006 Director/PDMR Shareholding 08/05/2006 Director/PDMR Shareholding 04/05/2006 Result of AGM 03/05/2006 AGM Statement 02/05/2006 Director/PDMR Statement 25/04/2006 Director/PDMR Statement 25/04/2006 Holding(s) in Company 20/04/2006 Director/PDMR Shareholding 13/04/2006 Holding(s) in Company 11/04/2006 Holding(s) in Company 10/04/2006 Director/PDMR Shareholding 04/04/2006 Director/PDMR Shareholding 29/03/2006 Analyst & Investor Conference 28/03/2006 Director/PDMR Shareholding 28/03/2006 Holding(s) in Company 27/03/2006 Annual Information Update Copies of the above announcements can be obtained from the London Stock Exchange website at www.londonstockexchange.com. 2. Documents filed at Companies House Date on Website Document Date Type Description 30/03/2007 288a Appointment of Director 30/03/2007 288b Resignation of Director 30/03/2007 288b Resignation of Director 29/03/2007 25/01/2007 88(2)R Allotment of Shares 29/03/2007 16/03/2007 88(2)R Allotment of Shares 29/03/2007 26/01/2007 88(2)R Allotment of Shares 29/03/2007 31/01/2007 88(2)R Allotment of Shares 29/03/2007 02/02/2007 88(2)R Allotment of Shares 29/03/2007 07/02/2007 88(2)R Allotment of Shares 29/03/2007 07/02/2007 88(2)R Allotment of Shares 29/03/2007 08/02/2007 88(2)R Allotment of Shares 29/03/2007 09/02/2007 88(2)R Allotment of Shares 29/03/2007 09/02/2007 88(2)R Allotment of Shares 29/03/2007 12/02/2007 88(2)R Allotment of Shares 29/03/2007 12/02/2007 88(2)R Allotment of Shares 29/03/2007 12/02/2007 88(2)R Allotment of Shares 29/03/2007 06/02/2007 88(2)R Allotment of Shares 29/03/2007 16/02/2007 88(2)R Allotment of Shares 29/03/2007 19/02/2007 88(2)R Allotment of Shares 29/03/2007 20/02/2007 88(2)R Allotment of Shares 29/03/2007 28/02/2007 88(2)R Allotment of Shares 29/03/2007 02/03/2007 88(2)R Allotment of Shares 29/03/2007 06/03/2007 88(2)R Allotment of Shares 29/03/2007 12/03/2007 88(2)R Allotment of Shares 08/02/2007 06/12/2006 88(2)R Allotment of Shares 08/02/2007 07/12/2006 88(2)R Allotment of Shares 08/02/2007 01/12/2006 88(2)R Allotment of Shares 08/02/2007 12/12/2006 88(2)R Allotment of Shares 08/02/2007 14/12/2006 88(2)R Allotment of Shares 08/02/2007 15/12/2006 88(2)R Allotment of Shares 08/02/2007 18/12/2006 88(2)R Allotment of Shares 08/02/2007 01/12/2006 88(2)R Allotment of Shares 08/02/2007 19/12/2006 88(2)R Allotment of Shares 08/02/2007 21/12/2001 88(2)R Allotment of Shares 08/02/2007 03/12/2006 88(2)R Allotment of Shares 08/02/2007 09/01/2007 88(2)R Allotment of Shares 08/02/2007 11/01/2007 88(2)R Allotment of Shares 08/02/2007 15 -17/01/07 88(2)R Allotment of Shares 08/02/2007 22- 23/01/07 88(2)R Allotment of Shares 24/01/2006 24/01/2007 288b Resignation of Director 24/01/2006 24/01/2007 288b Resignation of Director 24/01/2006 24/01/2007 288b Resignation of Director 24/01/2006 24/01/2007 288b Resignation of Director 24/01/2006 24/01/2007 288b Resignation of Director 25/01/2006 25/01/2007 288a Appointment of Director 25/01/2006 25/01/2007 288a Appointment of Director 25/01/2006 25/01/2007 288a Appointment of Director 25/01/2007 25/01/2006 288a Appointment of Director 06/01/2007 22/12/2006 RES13 Removal of Directors and Appointment of Directors on 22 December 2006 28/12/2006 24/11/2006 169(1B) Return by a Public Company Purchasing its own shares for Holding in Treasury 19/12/2006 23/11/2006 169(1B) Return by a Public Company Purchasing its own shares for holding in Treasury 14/12/2006 30/11/2006 88(2)R Allotment of Shares 14/12/2006 28/11/2006 88(2)R Allotment of Shares 14/12/2006 24/11/2006 88(2)R Allotment of Shares 14/12/2006 17/11/2006 88(2)R Allotment of Shares 14/12/2006 16/11/2006 88(2)R Allotment of Shares 14/12/2006 16/11/2006 88(2)R Allotment of Shares 14/12/2006 14 -15/11/06 88(2)R Allotment of Shares 14/12/2006 09 -13/11/06 88(2)R Allotment of Shares 12/12/2006 15/11/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 30/11/2006 10/11/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 24/11/2006 03/11/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 22/11/2006 09/11/2006 88(2)R Allotment of Shares 22/11/2006 07-08/11/06 88(2)R Allotment of Shares 22/11/2006 06/11/2006 88(2)R Allotment of Shares 22/11/2006 01- 02/11/06 88(2)R Allotment of Shares 22/11/2006 01/11/2006 88(2)R Allotment of Shares 22/11/2006 26/10/2006 88(2)R Allotment of Shares 22/11/2006 27/10/2006 88(2)R Allotment of Shares 22/11/2006 27/10/2006 88(2)R Allotment of Shares 15/11/2006 26/10/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 14/11/2006 18/10/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 08/11/2006 24/10/2006 88(2)R Allotment of Shares 08/11/2006 23/10/2006 88(2)R Allotment of Shares 08/11/2006 20/10/2006 88(2)R Allotment of Shares 08/11/2006 19/10/2006 88(2)R Allotment of Shares 08/11/2006 18/10/2006 88(2)R Allotment of Shares 08/11/2006 17/10/2006 88(2)R Allotment of Shares 08/11/2006 17/10/2006 88(2)R Allotment of Shares 08/11/2006 16/10/2006 88(2)R Allotment of Shares 08/11/2006 13/10/2006 88(2)R Allotment of Shares 08/11/20006 12/10/2006 88(2)R Allotment of Shares 08/11/2006 11-12/10/06 88(2)R Allotment of Shares 08/11/2006 09-11/10/06 88(2)R Allotment of Shares 08/11/2006 06/10/2006 88(2)R Allotment of Shares 08/11/2006 06/10/2006 88(2)R Allotment of Shares 08/11/2006 05-06/10/06 88(2)R Allotment of Shares 08/11/2006 17/10/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 27/10/2006 17/10/2006 395 Particulars of Mortgage/Charge 01/11/2006 02/10/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 01/11/2006 27/09/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 23/10/2006 23/10/2006 287 Change of registered office address - Minor amendment 19/10/2006 22/09/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 19/10/2006 19/09/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 18/10/2006 03/10/2006 88(2)R Allotment of Shares 18/10/2006 27/09/2006 88(2)R Allotment of Shares 18/10/2006 25/09/2006 22(2)R Allotment of Shares 18/10/2006 22/09/2006 88(2)R Allotment of Shares 18/10/2006 20-21/09/06 88(2)R Allotment of Shares 18/10/2006 13-14/09/06 88(2)R Allotment of Shares 18/10/2006 07-08/09/06 88(2)R Allotment of Shares 18/10/2006 01-05/09/06 88(2)R Allotment of Shares 04/10/2006 14/09/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 28/09/2006 11/09/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 28/09/2006 01/09/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 28/09/2006 06/09/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 12/09/2006 29/08/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 12/09/2006 17/08/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 12/09/2006 23/08/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 12/09/2006 29-30/08/06 88(2)R Allotment of Shares 12/09/2006 21/08/2006 88(2)R Allotment of Shares 04/09/2006 24/08/2006 88(2)R Allotment of Shares 04/09/2006 23/08/2006 88(2)R Allotment of Shares 04/09/2006 22/08/2006 88(2)R Allotment of Shares 04/09/2006 22/08/2006 88(2)R Allotment of Shares 04/09/2006 22/08/2006 88(2)R Allotment of Shares 04/09/2006 16-18/08/06 88(2)R Allotment of Shares 04/09/2006 18/08/2006 88(2)R Allotment of Shares 04/09/2006 17/08/2006 88(2)R Allotment of Shares 04/09/2006 17/08/2006 88(2)R Allotment of Shares 04/09/2006 15/08/2006 88(2)R Allotment of Shares 04/09/2006 14-15/08/06 88(2)R Allotment of Shares 04/09/2006 16/08/2006 88(2)R Allotment of Shares 04/09/2006 11/08/2006 88(2)R Allotment of Shares 04/09/2006 04/07/2006 88(2)R Allotment of Shares 04/09/2006 28/07/2006 88(2)R Allotment of Shares 04/09/2006 27/07/2006 88(2)R Allotment of Shares 21/08/2006 02/08/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 21/08/2006 28/07/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 18/08/2006 27/07/2006 169(1B) Return by a Public Company purchashing its own shares for holding in Treasury 18/08/2006 24/07/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 15/08/2006 19/07/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 09/08/2006 14/07/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 04/08/2006 11/07/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 31/07/2006 20/07/2006 88(2)R Allotment of Shares 01/08/2006 06/07/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 27/07/2006 12/07/2006 88(2)R Allotment of Shares 26/07/2006 28/06/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 20/07/2006 06-07/07/06 88(2)R Allotment of Shares 12/07/2006 27/06/2006 88(2)R Allotment of Shares 12/07/2006 23/06/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 07/07/2006 20/06/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 11/07/2006 13/06/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 05/07/2006 26/06/2006 88(2)R Allotment of Shares 29/06/2006 02/06/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 28/06/2006 6/06/2006 88(2)R Allotment of Shares 27/06/2006 23/05/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 27/06/2006 18/05/2006 169(1B) Return by a Public Company Purchashing its own shares for holding in Treasury 10/07/2006 363 Annual Return (details up to 30/04/2006) 23/06/2006 13/06/2006 88(2)R Allotment of Shares 23/06/2006 14/06/2006 88(2)R Allotment of Shares 21/06/2006 13/06/2006 88(2)R Allotment of Shares 21/06/2006 12/06/2006 88(2)R Allotment of Shares 15/06/2006 06/06/2006 88(2)R Allotment of Shares 14/06/2006 30/05/2006 88(2)R Allotment of Shares 12/06/2006 18/05/2006 88(2)R Allotment of Shares 12/06/2006 19/05/2006 88(2)R Allotment of Shares 12/06/2006 23.05/2006 88(2)R Allotment of Shares 26/05/2006 12/05/2006 88(2)R Allotment of Shares 25/05/2006 11/05/2006 88(2)R Allotment of Shares 22/05/2006 05-08/05/06 88(2)R Allotment of Shares 17/05/2006 31/03/2006 See description Interim Accounts 16/05/2006 03/05/2006 Res 09 S80 Amount renewed to 144,866,505 shares 16/05/2006 02-03/05/06 88(2) Allotment of Shares 16/05/2006 31/12/2006 AA Group of Company Accounts made up to 31/12/2006 10/05/2006 09/05/2006 288b Director resigned 15/05/2006 03/05/2006 Mem/Arts Amendment to Memorandum and Articles of Association 08/05/2006 03/05/2006 CertNm Company name changed from Spirent plc to Spirent Communications plc Certificate issued on 8/05/2006 Resolution passed on 03/05/2006 11/05/2006 27/04/2006 88(2)R Allotment of Shares 11/05/2006 24/04/2006 88(2)R Allotment of Shares 11/05/2006 24/04/2006 88(2)R Allotment of Shares 08/05/2006 21/04/2006 88(2)R Allotment of Shares 03/05/2006 05/04/2006 88(2)R Allotment of Shares 27/04/2006 06-11/04/06 88(2)R Allotment of Shares 18/04/2006 28-31/03/06 88(2)R Allotment of Shares 07/04/2006 27/03/2006 88(2)R Allotment of Shares 07/04/2006 27/03/2006 88(2)R Allotment of Shares 07/04/2006 27/03/2006 88(2)R Allotment of Shares 06/04/2006 24/03/2006 88(2)R Allotment of Shares 30/03/2006 21/03/2006 88(2)R Allotment of Shares 29/03/2006 20/03/2006 88(2)R Allotment of Shares 28/03/2006 16/03/2006 88(2)R Allotment of Shares Copies of these documents can be obtained from: Companies House Crown Way Cardiff CF14 3UZ United Kingdom Tel: +44 (0) 870 333 3636 E-mail: enquiries@companies-house.gov.uk If you are a registered user, you can access these filings through Companies House Direct at www.directcompanieshouse.gov.uk. 3. Documents Despatched to Members The following documents have been despatched by the Company to holders of its securities during the period: Interim Report for 2006 released on 10 August 2006 Notice of Requisitioned Extraordinary General Meeting Shareholder Circular released on 29 November 2006 Circular to Shareholders, re: Requisitioned EGM, released on 11 December 2006 Notice of 2007 Annual General Meeting released 30 March 2007 Annual Report for 2007 released 30 March 2007. All the above documents can be found on the Company's webstite at www.spirent.com. Alternatively, copies of information released can be obtained through the Company Secretary at the Company's registered office: Spirent House Crawley Business Quarter Fleming Way Crawley West Sussex RH10 9QL United Kingdom Tel: +44 (0) 1293 767676 Michael Anscombe Deputy Company Secretary Spirent Communications plc Signatures Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. ______MICHAEL ANSCOMBE______ (Registrant) Date: 02 April, 2007 By ____/s/ Michael Anscombe____ (Signature)*