Depends. If independence was declared by less than 20% of the population (that's the number who voted SNP in 2017 UK election, and in 2016 Scottish), then I wou

Depends. If independence was declared by less than 20% of the population (that's the number who voted SNP in 2017 UK election, and in 2016 Scottish), then I would expect the UK government to stand up for the 4.5 million others. However if say 4 million of the 5.5 million that live in Scotland were in favour, I'd expect an amicable separation Catalonia has a population of 7.5 million. If say 5 million wanted independence, then morally why can't they have it? In their referendum, only 2 million that wanted it, that's not enough to force the other 5.5 million to leave Spain, but surely it's enough to talk about it seriously though.