Deal, No Deal, Brexit delay, second referendum? Here's the latest news.
Britain's departure deadline is 11pm on Friday, March 29, 2019.
In between this date and December 31, 2020, some form of transition period is expected.
The grace period will allow businesses and others to prepare for the day the new post-Brexit rules between the UK and EU begin.
Free movement will continue throughout the transition period.
The UK will be able to make its own trade deals, however, they will not come into force until January 21, 2021.
Future relations between the UK and EU have been subject to extensive negotiations, but it is not yet known how things will work in the long term.
Both sides hope they can agree within six months about issues such as trade, travel and security.
The deal could then be given the go ahead in time for the day the UK leaves.
On March 13, the House of Commons rejected leaving the European Union without a deal in any scenario.
This happened in a non-binding vote which will increase pressure on Prime Minister Theresa May to rule out a "No-Deal" exit.
MPs voted by 312 to 308 in favour of Amendment A, a proposal put forward by a group calling on the government to rule out a No-Deal exit.
As a result, Britain is tonight heading for a delay to Brexit after MPs voted to block ever leaving the EU with No-Deal.
That means that the House of Commons will make a formal demand for a Brexit delay tomorrow – meaning the UK is unlikely to leave the EU on March 29 as planned.
The PM will be forced to ask the EU to grant an extension of up to three months .
The gambit means Britain is almost certain not to quit the EU on time – and makes it more likely we might never leave at all.
Commons Leader Andrea Leadsom became the first Cabinet minister to publicly raise the prospect of requesting an extension of Article 50 to give the Government time to pass the necessary laws.
The leading Brexiteer Cabinet minister told BBC’s Newsnight that she was confident the EU would agree to giving the UK a “couple of extra weeks” beyond March 29.
The comments are hugely significant given Mrs Leadsom is in charge of timetabling the Government’s legislation.
Just months before the UK was due to extract itself from the EU, Theresa May finally agreed on a departure deal with the EU – only to realise most of Parliament wouldn't back it.
So at the eleventh hour she pulled a Commons vote asking MPs to agree on the Brexit plan – a move that backfired when it triggered a vote of no confidence in her leadership the very next day – the first in nearly 40 years.
May narrowly survived the vote on December 12, 2018, and the vote was postponed to January 15, which May lost by historic margins, 432 to 202.
This was swiftly followed by a vote of no confidence in her government that was tabled by Labour leader Jeremy Corbyn, which May to won by 19 votes on January 16.
If EU leaders and Parliament reach no agreement in the next three months, then Britain is set to crash out of the EU with no formal arrangements for the future relationship.
A No Deal Brexit would not see EU citizens lose their residency as the government has said they would need to apply to the EU Settlement Scheme by December 31, 2020.
There is also uncertainty over what would happen at the 310 mile border between Northern Ireland and the Republic as Eurocrats in Brussels say it would become a hard border.
On January 29, the UK parliament backed an amendment instructing May to demand that Brussels replace the backstop — which aims to avoid customs checks on the island of Ireland after Brexit – with "alternative arrangements".
Customs checks on cross-Channel freight could also cause havoc at ports, hitting food supplies and other goods such a motor parts.
This is a scenario that everyone May wants to avoid.
Civil service chief executive John Manzoni said Whitehall would double the number of staff working on Brexit if talks collapse and Britain leaves the EU on March 29.
On March 12 a "meaningful vote" will take place, giving Mrs May one more chance to push her deal through the Commons.
In characteristic eleventh-hour style, the PM jetted to Strasbourg on the eve of the vote to hold talks with European Commission President Jean-Claude Juncker.
If her deal is rejected MPs will then vote on a No Deal, which could lead the UK to crashing out of the EU.
Or they could vote on requesting an extension – unlikely to be popular with the EU.