I suppose should the Scots say yes to independence the UK will just reclassify itself as the United Kingdom of England, Wales and Northern Ireland. Prior to Irish independence the sovereign state was defined as the United Kingdom of Great Britain and Ireland. The advantage of having a name such as the United Kingdom is that you don't need to change the name when ever parts detach themselves from the whole.
Rather like UKOF ~ has a certain ring about it which i am sure the Scots will like.
