Living in Europe I have a personal interest in Brexit, as I have funds held in Sterling. The British pound has been in steady decline against the Euro, with a sharp fall triggered by talk of a 'hard Brexit'. I forecast it won't be long before the Pound and Euro are at parity; and money talks.
When I say 'money talks' I mean that the UK's decision to leave the E.U. has been judged by folk who have an economic interest rather than an idealistic one.
Any country that rejects immigration in the 21st century is doomed to failure IMO. The UK, like most First World countries has an aging native population that has to be supported by a young working population. The ratio is getting worse for those countries like the UK, USA and especially Japan.
I see Brexit as a retrograde policy.