Yanis Varoufakis's advice to Mrs May in May 2017 still makes sense

'The only way May could secure a good deal for the UK would be by diffusing the EU’s spoiling tactics, while still respecting the Burkean Brexiteers’ strongest argument, the imperative of restoring sovereignty to the House of Commons. And the only way of doing this would be to avoid all negotiations by requesting from Brussels a Norway-style, off-the-shelf arrangement for a period of, say, seven years.
'The benefits from such a request would be twofold: first, Eurocrats and Europhiles would have no basis for denying Britain such an arrangement. (Moreover, Schäuble, Merkel and sundry would be relieved that the ball is thrown into their successors’ court seven years down the track.) Second, it would make the House of Commons sovereign again by empowering it to debate and decide upon in the fullness of time, and without the stress of a ticking clock, Britain’s long-tem relationship with Europe.'

(Norway yes, for seven years, but not Norway plus please, which means joining the EU customs unions and not being able to sign trade deals.)