"All the questions I can think of have problems but I find Soubry's idea of ranking May's deal, no-deal and remain in order the best."

I can't agree with this. Whatever way you juggle the votes around in order to do the eliminating, you would be doing two things: squeezing out an awful lot of people's second-best from consideration, and giving leave two options but only one for remain. That simply would look wrong on the ballot paper. There'd be wigs on the green if remain were to lose.

I think you'd have to ask the people whether there should be another referendum or not. If yes, the next question could be a binary leave/remain, and remain would (probably) be a shoo-in. If no, then we take that as the go-ahead for May's deal. Yeah, problems, problems. But if you can find a better 'ole...