If you want a rough idea of how European borders would have to be redrawn if regions with a separatist agenda got their way, you can look at the map below, put together by the European Free Alliance, to which “40 progressive nationalist, regionalist and autonomous parties throughout the European Union” belong.
Scotland has, of course, been in the news, as has Spain‘s Basque region, but there are a number here I hadn’t been aware of, from Andalusia to an independent Venice.