The Norway option is not an option for two reasons. First, Norway will not let us become members of EFTA on the same terms because they know we'll swamp it (not my opinion: they've said so). The EU has nothing to do with that. Second, brexiteers will very gleefully point out that "we did not vote to stay in the single market, to allow free movement, to keep paying money to the EU and to have no say in rule-making." Finally, and even worse in the eyes of brexiteers, the "Norway-plus" option also involves staying in the customs union. It's remain without the bollocks. It'll do me if we really have to leave, but it ain't gonna happen!