Plans to force remaining EU nations to adopt the single currency and complete a monetary union could be set to cause uproar among member states.
EU leaders will press the British prime minister to waste no time triggering his country’s divorce from the bloc at a tense summit on Tuesday, seeking to stave off the threat of prolonged instability in the wake of last week's Brexit vote.
Stalemate between Britain and the European Union over what happens next following Britons' referendum vote to leave has opened up a host of possible scenarios.
Here are some that are (in some cases, barely) conceivable:
Boris Johnson has said the UK there will be “still have access to the single market”, despite Britain’s historic vote to leave the EU.