but what consequences of such thing for conservatives?
It's questionable whether or not they have a mandate to trigger Article 50, especially if they win a general election on that basis.
i mean that would be total betrayal of public who voted.
Not really. It was always made clear that the referendum was non-binding, the majority was less than 2% (and when averaged out with the turnout, only around a third of eligible voters voted 'leave'), many of the leave voters have admitted they did so on the basis of incorrect information from the leave campaign and are now regretting it, and above all, there are solid grounds under constitutional law not to trigger Article 50.
UKIP support would skyrocket
Fortunately with the first-past-the-post system, that doesn't mean they'd win any seats.
a snap election will be called, brexit will be reversed.
Yes. The result could go either way (a lot depends on whether we in Labour can consign the Islington beardy to political oblivion or not) however both parties are likely to have the same policy here. The LibDems (rember they were part of a coalition a while ago) would do well if the Islington beardy and his trot entryist followers are still around and their declared policy is to ignore the non-binding referendum. The SNP, Britain's 3rd party are very clear that their voters wish to be in the EU.