The left hand lane is the natural place for slow drivers. just because you Americans (of the USA kind) live in a mirror image world, doesn't mean that the natural order of things shouldn't be obeyed.

Left hand lane is for slow drivers, Right hand lane is those going faster. When many of you lot come to my country, you suddenly get a light on and realise that your road rules are those of a drongo and you appreciate that you are now driving in a sane world.