Hardest thing is the roundabouts, especially the three-lane ones. When my wife and I were on a long trip, she would watch for the directional sign, and referring to the roundabout as if it were a clock face, she would say "Christchurch, 2 o'clock!", then I would know where my exit was and which lane I should be in. The worst sensation is being on the inside lane, traffic whizzing all around you, and no way to get out to your turnoff. "Stop the world! I want to get off!" indeed. If you think the English are too polite and reserved, cut in front of one of them on a roundabout.