As a resident non Scottish UKer, I think they would hand the dirty work to Scottish unionists to start violence, and then the Westminster government would have to send in the troops to "protect the population", and there they'd stay with their guns pointed at the natives, just in case. It would be sold to the ordinary population of rUK as a necessary security measure.
If there was any sign of the population disagreeing with this, a few atrocities committed supposedly in the name of Scottish independence would soon quieten it down.
Oh for god's sake! This is nothing more than hysterical (and perhaps wishful-thinking?) rhetorical garbage.
The ultra-nats in this debate are continually (and again, IMO, wilfully) missing the point that it would be very unlikely indeed that the UK national government would "refuse" to allow Scotland to hold an independence referendum (and to then declare independence from the UK if there was a majority Leave), provided certain reasonable conditions were met.
I've already opined that an example of such conditions might be something like: "No referendum until the negotiations for the UK's exit from the EU have been fully concluded, so that the Scottish people know what they would be getting if Scotland stayed within the UK; and no referendum until after at least three years of reliable independent polling showing support for independence in the majority".
The ultra-nats here almost seem to
want the UK government to say "flat out no". That way, they could achieve what appears to be their dream: brave Scotland turning round and showing its bare backside to the English enemy, courageously forging ahead with their own future, decided by the "will of the people", and watching and laughing as "England" could do nothing to stop them.
The reality and realpolitik is, of course, massively different. If there's sustained majority will in Scotland for independence, and (in a condition which I believe is likely to be insisted upon by the UK government, and which is entirely reasonable to any objective observer) the Scottish people wait until the outcome of UK Brexit negotiations to see what effect the new relationship between the UK and the EU might have on their desire for Scottish independence, then it's (IMO) very unlikely indeed that the UK government would ever seek to block a referendum or refuse to honour its outcome.
The ultra-nats also seem to think that the immovable position of the UK government must somehow be against Scottish independence, and that this will necessarily translate into refusal to grant a referendum/independence. And while Scottish independence certainly is against the desired ideological position of all the main Westminster parties, be in no doubt that pragmatism and fairness will outvote all of that if/when it comes down to it. One might, as some sort of an example of this apparent contradiction (which is not a contradiction at all in fact), state that all the main political parties in Westminster are against sending ground troops to a war in Syria - but it might just be, at some point, that the UK government (via parliament) judges that it is in the best interests of the UK to send ground forces to Syria.
In short, there simply WILL NOT be a scenario where the Scottish government holds a referendum without the necessary assent (and enactment of the appropriate amendments etc) of the UK government. Neither the Scottish government nor the UK government could possibly want such a situation to arise. There may well be protracted and heated negotiations over precise conditions, but I don't think anyone should be in any doubt that any future Scottish independence referendum will more-or-less exactly follow the process of the 2014 referendum: the UK and Scottish governments will, at some point in the future, make a joint declaration, in which the UK government will announce that it has agreed to devolve the power for a referendum to the Scottish government and that it will honour the outcome if there's a majority Leave vote (by passing some sort of "Independence of Scotland" act through parliament and into UK law).