The white paper, which outlines Britain's vision for Brexit, does make independent trade deals tricky.
An informal part of the Westminster process has come under the spotlight during voting on a key piece of Brexit legislation.
Enough MPs oppose a no-deal Brexit to form a government together, but party rivalries are difficult to overcome.
Is the UK's Brexit plan enough to avoid a hard Irish border?
The UK government has consistently pledged freedom from European laws. It's clear now that the plan is no such thing.
The public broadcaster tries to cater to all views, but sometimes that's a dangerous strategy.
Leading a party divided over Europe and unable to make her ideological mark, the prime minister is experiencing similar troubles to another Tory leader. But how will it end?
The Electoral Commission has ruled the official campaign to leave the EU broke funding rules.
Both Leavers and Remainers are unhappy with the UK's exit plan – but can their dispute ever be resolved satisfactorily?
Scientists have never been more needed to challenge division, misinformation and harassment online.
There is historical precedent for suing the EU. But is it a good idea?
Despite promises, it's hard to deny that the UK's standards on agriculture, air pollution, and climate change are under threat.
In its Brexit white paper, the UK government proposed a new UK-EU youth mobility scheme. But the details remain vague.
The British foreign secretary, Francis Osborne, tried to negotiate free trade deals with eight European rivals in the late 18th century. Guess how many bit the dust.
Efforts to keep Trump's itinerary as tight and cloistered as possible failed to avoid a classic diplomatic calamity.
It sparked a series of government resignations, but what's actually in Theresa May's Brexit plan?
It's been a rough ride lately, but maybe, just maybe, the PM could now navigate her way to Brexit success.
The PM will surely have to make some concessions to Brussels. Can she get them past her party further down the line?
And it doesn't involve immigrant bashing. Quite the opposite.
Despite the problems that lie ahead with the Brexit plan Theresa May hammered out at Chequers, the EU prefers a Brexit deal rather than a 'no deal'.