Alistair Darling probably doesn't have a response to "post-glacial rebound" and "glacial isostatic adjustment". But, regardless of the outcome of today's Scottish referendum vote, those environmental factors are causing Scotland to physically, if not politically, rise.
As explained by Giz favourite Tom Scott in the clip below, the Scottish landmass has been slowly shifting for millennia, rising around 10cm every century, while Britain is literally sinking by about 5cm every hundred years. It's a leftover from a time thousands of years ago when Scotland was a glacier-covered tundra. If you think relations between Scotland and Britain are icy now, imagine what it must have been like then.