Brexit: Would UK membership of the EEA work?
A softer route to EU withdrawal would see the UK take on temporary membership of the European Economic Area (EEA) and European Free Trade Association (Efta) alongside countries like Norway and Iceland while a future trade deal is negotiated.
The idea was proposed by Tory backbencher Nick Boles and backed by some Labour MPs
Efta membership would allow the UK to remain within a common market area with the EU and continue existing customs arrangements, while pulling out of common agricultural and fishing policies. But critics say it would mean accepting freedom of movement for EU citizens.
And Norway's Prime Minister Erna Solberg has said it would be "difficult" for existing Efta members to accept an application to join by a country which has made clear it would want to leave soon afterwards.