Don't know how you work that out...
It's not rocket science, Ana
Cameron was having problems with the extreme right wing of the tories. He promised them a referendum to keep them sweet. There was absolutely no need whatsoever to have one; no crisis in the UK, no crisis in the EU.
As he (and most MPs) never imagined for one moment that the result would be a 'No' they didn't bother to devise an appropriate referendum and despite the advice of the Civil Service that the referendum was advisory (see the Commons briefing paper) they promised to go with the result. But because they had no idea that the result would go against them they had absolutely no contingency plan in place, apart from saying that they would invoke A50 straight away. Though, to be fair, neither did the b****y Leavers, some of whom hadn't wanted to 'win' as it turned out.. Then the idiot who got us into this mess ran away, tra la la ing, to live on his inherited wealth and the enormous fees he'll get for 'consultancy' work and after dinner speeches.
Do I really need to go on? It was a mistake; they didn't mean to do it...
And just to depress us angry Remainers more, I found this on twitter this morning:
extranewsfeed.com/50-dumb-fuck-reasons-for-leaving-the-eu-66a40c72c1da#.l6x0ccrom
I do actually know people who have used some of these reasons...