Boris Johnson has called on the UK to negotiate a new "pared-down relationship" with the European Union.
The London Mayor said Britain should remain in the single market but pull out of the political union.
The UK should form an "outer-tier" of the EU with countries like Norway and Switzerland, he said in a speech.
And a referendum should be held with the question: "Do you want to stay in the EU single market as renegotiated? Yes or No?"
http://www.bbc.co.uk/news/uk-politics-20592596