Best of three is the customary way to settle things like that, aken. Seems a reasonable way to go.

As I pointed out, in pretty every other aspect of our lives where it is physically possible, we ensure that we've a chance to change our minds.

And once again I'm not actually calling for a second vote, because it's not going to happen. But I saying that this has to be recognised as a political decision, and that this nonsense about there would be something anti-democratic in having another referendum, or that people calling for it are being undemocratic.