In reply to tony:
> Even before devolution in 1998, Scotland already did its own thing in health and education, had a separate legal system (the right to retain a separate Scottish legal system was enshrined in the 1707 Act of Union), land access and ownership, and had a different relationship with established churches.
It always strikes be as ironical, or unfair even, that Scotland being allowed to maintain its regional differences - essentially a generous and open minded concession at the time - is now used as an argument against the union today! Perhaps all those North and South of the border, who set things up like this back then should have adopted the French centralising approach at the time of the revolution and imposed norms of language, laws and so on? Until a few years ago, for example, Breton children were beaten if they spoke Breton in class, all in the name of national unity.
> For a union, there has always been a lot of difference.
There are all sorts of local differences even so, and, taking the French example, local languages and customs are now being encouraged - Breton, Catalan etc. There is one part of France with different educational and religious setup, Alsace, as they were broken away from France in 1870 and only rejoined again in 1918. By then the insistence on totally centralised administrative norms had declined a little, which doesn't make the people there feel any less French, quite the opposite, they have first hand experience of how weak and vulnerable they would be if not part of France.