The simple math is that 35% of the voters (summing the Brexit and rump UKIP vote) voted for a "No Deal" (i.e. WTO) Brexit. And a similar percentage summing Lib Dems, Greens, CHUK etc voted for remaining in the EU.
So the "remaining" (oops) question is how remain and leave voters are distributed among the rump of the two main parties. And how these floating voters would decide the result of a second referendum. Depending, of course, on the choices made availabe on the ballot paper.
My only certainty is that, whatever the question, if the lumpenprolateriat got it wrong a second time, then all the hypocrites advocating a "People's vote" as a "confirmatory vote" and the "only way out"
would set about subverting the "wrong" decision for a second time.
The same arguments and rationalisations and the same repetitions of (demonstrably) false prophesy. The same arrogant pretensions. The same conviction that my degree in physics, or my role as Lavinia in Winchester Theatre means that my vote is worth two of yours.
And, of course: we demand[ a recount.