The general concensus is that if Scotland leaves what remains of the UK will be the remaining successor state and Scotland will be the new state. No-one of significance in the Yes camp argues other than that so Musket is right on that one.

dJust as the UK gvt supposedly has no contingency plans in place for a Yes vote I think it is true that the UK public haven't thought about the aftermath either. Basically it has been head in the sand stuff imagining it simply couldn't happen. Even though it now looks extremely close.

The rUK would be the successor state but what would it call itself? I suppose it could leave the name unchanged - though it wouldn't be that logical to do so. When Ireland as a single political entity ceased to exist then the UK changed its name to the "United Kingdom of Great Britain and Northern Ireland". So if Scotland leaves politically Great Britain will no longer exist. Geographically only a part of GB would be wtihin the UK. It could still be used but it wouldn't be logical to do so! South Britain doesn't have much of a ring to it so I suppose the "United Kingdom of England, Wales and Northern Ireland" would be the most logical and least confusing for others.

What about the flag? Again probably stay as it is but again not very logical. Three crosses on the flag one representing a country that is no longer in the union whilst one of the countries within the union isn't represented on the flag!