Back in the mists of time there was a debate at my school on "UDI for the Isle of Wight". It was meant to make us think about independent states, and was successful in that. I remember several points such as the cost of a separate judiciary, the problems of trade, and where to get electricity. The land-retentive propensities of the UK were mentioned, too, although we forgot to consider flag-waving for Queen Victoria.
Later, in an oral Spanish exam, I was asked my views on the drive for independence in Alsace and the Basque area. I hesitated at first, because the lecturer asking the question was Welsh, but argued that small states would have trouble surviving and amalgamation was better for them, although it did horrible things to their cultures,
I have changed my mind since then. I lived in Wales, in a fairly Welsh-speaking area, which raised several new points about mangled history and control by conquerors. Then various changes arrived, such as:
* The EU developed from a set of trade agreements between a few countries determined not to repeat the horrors of WWII into an international body with a rather more sensible structure than the evolved complexities of most of its member states; small states can foresee a time when they could function under its umbrella without the need for costly political, trade, and legal structures.
* The Interwebs made international communication the norm, and the dying g(r)asps of national laws begin to look silly.
* We're rapidly heading into devolved, localised electricity-generation.
I'm not sure the inhabitants of the Isle of Wight would want independence, but it seems more feasible now. And perhaps there really could be a People's Republic of Yorkshire. Meanwhile, have a look at this roadmap for independence for Scotland
Oh, the Prospero reference? See next post.
 Properly-organised debates at lunchtimes, with speakers from the debating society. Not sure this is still a thing in state schools.
 Unilateral Declaration of Independence