Like many English people I observed the progress of the Scottish independence referendum campaign in a rather detached way. Since only the Scots got to vote, it was easy to suppose that it only really concerned the fate of Scotland - their business not mine. Only towards the end when the Yes campaign surged in the polls did it begin to feel real and exciting. And only then did I start to appreciate its significance to the rest of Britain. What if the Scots decided to leave? What kind of political crisis would that create? And what kind of opportunity to reinvent RumpUK as something new and better?