Well, progress but no repair yet. It looks as though it may be the side stand switch. Playing with the side stand got the bike to start but it then cut out again. Having taken the side and main stand off it looks as though this has been bypassed by a previous owner. The wire at the side stand was cut, and a wire beneath the seat, with the same colours has been soldered together. This, I think means a loose wire further up the harness, but it could take some time to identify. Does anyone know if stoddarts is open a bank holiday Monday, as I suspect my technical limit has been reached. The alternate is to recover home which will be gutting if it is just a loose wire...