If there was ever to be a workable Brexit it should have been driven by a Leaver. Theresa May was not a Leave campaigner before the referendum, just an anti-immigrant Home Secretary.

She therefore adopted the anti-free-movement position, which condemns the UK to being outside the free trade area, and completely blows up the Ireland situation.

What "should" have happened is one of Johnson, Davis, or Gove running it. Or, after the Tory Party elected a Remain leader, she should have stayed Remain and run a GE on that basis. If people wanted Leave they would have had to vote in UKIP.

Building a deliverable, realistic consensus approach with cross-party support, reflecting the relatively close outcome of the initial referendum and the diversity of opinion within the "leave" movement.