Last weekend, we went to Wales.

This is no small feat. Although Britain is not really that large and claims to have a modern road system, we have tended to ignore suggestions that people might want to go to the further-flung corners of our green isle. There is no motorway across the border into Scotland, for example. The English M6 stops just short of Carlisle, and the Scottish M74 starts once you are across the border. It’s a little like East and West Germany having different gauge rails during the Cold War, except that (nominally at least) we’re all on the same side.