(19)

(11)

EP 1 336 020 A1

(12)

(43) Date of publication: 20.08.2003 Bulletin 2003/34 (21) Application number: 01996662.1 (22) Date of filing: 15.11.2001

(51) International Patent Classification (IPC)7: E04H 15/62 (86) International application number: PCT/GB0105/021 (87) International publication number: WO 0204/0811 (23.05.2002 Gazette 2002/21)

(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: 15.11.2000 GB 0027891 (71) Applicant: Birss, David Peterborough PE1 4AW (GB)	(72) Inventor: Birss, David Peterborough PE1 4AW (GB) (74) Representative: Smith, Peter James  Serjeants,25 The Crescent,King Street Leicester LE1 6RX Leicester LE1 6RX (GB)