A few weeks ago Nick Boles MP put forward a proposal that asserted that the United Kingdom had a "treaty right" to remain a member of the European Economic Area.
In my view that proposal by Nick Boles is, legally speaking, a dead-end.
Brexit Briefing Paper No.5 which can be accessed
Brexit Briefing Paper No.5: Nick Boles MP's so-called "Better Brexit" proposal is a dead-end
sets out a line of legal argument which demonstrates that Mr. Boles' proposal is a dead-end.