I've never been to Britain, but I have been to Bermuda where they also drive on the wrong, I mean, left side of the road and let me tell you it was freaky. Even as a passenger crossing the street I found I would look the *wrong* way and then start to cross and find a car coming right at me. Nearly got myself killed a couple of times!

I saw a show on tv once that explained the reason for driving on the right or left side of the road. I can't remember much about it, but it had something to do with horses and carriages and the side of the carriage the driver sat to steer the horses.