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(11)

EP 1 745 451 A1

(12)

(43) Date of publication: 24.01.2007 Bulletin 2007/04 (21) Application number: 05741910.3 (22) Date of filing: 04.05.2005

(51) International Patent Classification (IPC):  G08B 13/16(2006.01) H04M 11/04(2006.01) (86) International application number: PCT/GB2005/001687 (87) International publication number: WO 2005/106815 (10.11.2005 Gazette 2005/45)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 04.05.2004 GB 0409945 (71) Applicant: Mygard Plc Aylesbury HP20 2JH (GB)	(72) Inventors: HEATON, Michael, c/o MyGard Plc Aylesbury HP20 2JH (GB) BEARDMORE, Jonathan, c/o MyGard Plc Aylesbury HP20 2JH (GB) ECCLESTON, Andrew, c/o MyGard Plc Aylesbury HP20 2JH (GB) (74) Representative: Shindler, Nigel  Brookes Batchellor LLP 102-108 Clerkenwell Road London EC1M 5SA London EC1M 5SA (GB)