Thank you for this link Maizie, especially the Dominic Cummings blog where he stated "Creating an exit plan that makes sense and which all reasonable people could unite around seems an almost insuperable task. Even if one succeeded, the sheer complexity of leaving would involve endless questions of detail that cannot be answered," he wrote. "There is much to be gained by swerving the whole issue."
The detail of how Brexit would actually work was, basically, too hard a sell. If people had got a glimpse of the decades of difficult trade-offs and punishing stalemates through which we are currently living, they would never choose them.
Much easier to cynically promise simple, brilliant, no-downside deals, concluded over a cup of tea in one afternoon, then pin the blame onto someone else when they do not materialise. Ireland, the EU, May, Johnson, parliament, judges, 'Remoaners' - anyone would do.