This weekend past was the MCN London Show at Excel; and yet again I really found myself enjoying it.. Because although there’s the usual combination of aggressive-looking, jabby bikes, crap music and visually-jarring colours from helmet and clothing stands, all bound up with a sort of force-fed, ‘all the fun of the fair’, there is an unusually upbeat atmosphere that gives me hope for the future of motorcycling in all its forms. This particular show has improved immensely since I first visited –…