> Russia and friends would seem to have an interest in Scottish independence as it undermines the UK.
Famously, Alex Salmond (at the time, the leader of the Scottish National Party) was given a regular programme on Russia Today. https://en.wikipedia.org/wiki/The_Alex_Salmond_Show
Say what you want about Scottish independence (its for the Scots to decide), but a break up of the UK would serve Kremlin interests no end.
I actually think that the process around Scottish independence actually demonstrates that the UK is actually relatively sane - a part of the country wanted to consider independence, the government at the time said "OK you can have a referendum", the referendum was held and Scotland voted to stay in the UK.
I was, and still am, a support of Scottish independence but I how the whole thing was handled reflects pretty well on the UK as a whole.