Budget, immigration, ECJ oversight – that's probably not a bad interpretation of the key demands made by voters. If we left the EU but remained in SM or Erasmus, how many would protest? But say we left, but remained under ECJ j'diction, how many then?
But it is the wrong question for a more important reason: it fails to include the 48% who voted Remain. Every remain voter’s views as to the right type of Brexit also counts, and counts as much as any Leave voter’s.
The PM’s mistake has, from the outset, been to ask this wrong question: “what did Leave voters want?”. The question she should have asked is “what version of Brexit can command a broad consensus across Leave and Remain?”.
That mistake has led to all the other mistakes: treating Brexit as a matter to be decided by the PM and her coterie as the sole permitted interpreters of “the will of the people”; premature use of A50; attempts to sideline Parliament; the language calculated to enrage Remainers.