With the UK on course to leave the European Union in March next year, the country faces four possible scenarios.
The UK and the EU both insist they want as amicable a divorce as possible, with a legal agreement setting out the kind of relationship they will have when the UK is no longer a member of the club.
Prime Minister Theresa May wants to keep close ties with the EU in certain areas, such as trade in agricultural products and allowing skilled migrants access to jobs in the UK.
She says her plan will allow Britain to take back control of its laws, money and borders, just like people voted for in the 2016 EU referendum, while also allowing as “frictionless” trade as possible and avoiding a physical border for Northern Ireland.
But it has been attacked as an unworkable compromise by people from both the Remain and Leave ends of the debate.
The EU may also decide to reject it, but the two sides are still hoping to strike some kind of deal by the autumn and, despite criticism and ministerial resignations, Mrs May believes this is the best option.
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