Maybe what will happen is that Article 50 will be invoked, the conditions set by the EU will then be made public and after that there will be a debate in the Commons and around the country followed by a vote in the HoC. But the terms of he debate will be determined by the nature of those conditions. If the electorate sees that the consequences of leaving will be good/manageable/bad/very bad/ dire, then maybe there'll be a second referendum. That referendum would be appropriate than the first one, as people would know the details of what they're voting for or against.
Whichever way, the whole thing has been a farce of monumental proportions and I think to vote to remain after all that has happened wll make us the laughing stock of Europe. Statesmen ? LOL. Has Cameron been made a Lord yet ?
There is no coming back from that, if I'm not mistaken.