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(11)

EP 1 395 715 A1

(12)

(43) Date of publication: 10.03.2004 Bulletin 2004/11 (21) Application number: 02738348.8 (22) Date of filing: 31.05.2002

(51) International Patent Classification (IPC)7: E04B 1/34, E04B 1/348 (86) International application number: PCT/GB2002/002545 (87) International publication number: WO 2002/097206 (05.12.2002 Gazette 2002/49)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 01.06.2001 GB 0113377 (71) Applicant: Bluebase London EC1M 5PX (GB)	(72) Inventors: WILLINGALE, Mark London EC1M 5PX (GB) COOK, David London EC1M 5PX (GB) HAMM, Matthias, Christian London EC1M 5PX (GB) (74) Representative: Evans, Claire et al Edward Evans BarkerClifford's InnFetter Lane London EC4A 1BZ London EC4A 1BZ (GB)