after all the UK is a legal union so Scotland is already independent
Afraid that just isn't true.
Union in 1707 - although it sounds like a shotgun wedding of sorts. Scotland and England had shared the same monarch since King James circa 1606.
It isn't an assertion of superiority of one group of another
samdrub wrote: Not to mention the innovators and inventors, scientists and thinkers who have shaped the modern world we live in.
I've heard similar assertions of Scottish superiority usually stated as name an English scientist or inventor, to which in response hapless Americans recite a litany of Scotts.
It is the feeling that as a region we could do a better without inefficient Westminster.
Ok, have at it.
It is also pretty depressing that a country that which enshrines the values of democracy
The US does not enshrine the values of democracy. Only a minority of people do otherwise there would not have been slavery or legal prejudice, etc. The US enshrines the values of it's own form of capitalism and is pretty set on a revival of Dickensonian England where people are utterly devalued except as meager producers subject to corporate thumbs and enthralled by sense experience and strangling in debt.
especially the 'Declaration of Arbroath', which even one of your presidents said had an influence on the founding fathers.
People are always claiming this or that document or line of thought that had influence upon the Founding Fathers. Most of the Founding Fathers were highly educated, wealthy, upperclass people. They essentially had access to all the published knowledge of the world and many things might have influenced them but it often seems like a stretch (for example, the Irish were alleged by Patrick Buchanan to have significantly influenced the Founding Fathers, others claim the Huron Confederacy had a direct impact).
Guess what - the country that emerged from the 1776 Declaration of Independence was still a slave owning society not deeply committed to liberty as claimed. It was committed to a very narrow interpretation of liberty. Some people did in effect support universal liberty (Vermonters for example). Most didn't. The US isn't the US because Jefferson wasn't Jefferson, even cribbing from George Mason (who also didn't live up to his ideals).
However I am concerned that European regionalism could devolve into war and genocide not that I think that will happen over in the British Isles (it has already of course with the Serbo-Croatia wars and genocide, ongoing Basque terrorism, occasional South Tirolian terrorism, etc.).