I'd preface everything by saying that I'm assuming there will still be an EU by 2018, because if Marine is elected in France, not beyond the realms of possibility, she will pull out and like it or not that will be curtains for the post-war project.
Anyway, we're heading for Leave, on terms that will be a compromise, probably involving interim arrangements where the UK makes a financial contribution to have privileged (as opposed to ordinary) access to the single market. This must be the government's broad objective, so there, you have it. Talk about a second referendum is for the fairies and the Lib Dems who hope ultimately to get a few more MP's in Remain territories on the strength of it. But for the record, if it ever came about, there would be a huge groundswell of Far Right support particularly in the North imo. And, yes, I do take the Farage view that there would be problems on the streets. We'd be back to the 1930's, only worse, because the Far Right would have been handed a justifiable sense of grievance.