Hlafordlaes
Disorder of Kilopi
I think it's more likely that if there is a Brexit, other EU countries will be queueing up to hold referenda for Exits of their own.
All any smart leader need to do on that score is delay. The negative impact of Brexit on the UK will become clear soon enough. I expect it to be an object lesson in the dangers of following fancy, not fact, something the Leavers seem to share with Trump.
The nasty secret, you see, is that everything the Leavers are complaining about are exactly those things that signal that Britain is, indeed, Great. All the advantages of membership are background noise, and so are easily lost in the din. They will be missed when gone.
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As an aside, Brexit and the rise of people like Trump signal something needs to change wrt paying attention to middle class whites or native Brits. Aggregate economic statistics are hiding the hit these people are taking in certain geographic and demographic groupings, and feeding a discontent that the numbers would say should not be there, leading to major mayhem.