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.
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?
Both Leavers and Remainers are unhappy with the UK's exit plan – but can their dispute ever be resolved satisfactorily?
Britain is experiencing a moment of great cultural tension. The US president isn't helping.
It sparked a series of government resignations, but what's actually in Theresa May's Brexit plan?
The PM will surely have to make some concessions to Brussels. Can she get them past her party further down the line?
Everything you need to know about Conservative leadership contests.
Badly wounded and yet limping along, May seems condemned to govern in interesting times.
The UK has a constitutional convention of collective ministerial responsibility. Here's why it matters – and must endure.
After the resignation of David Davis, Dominic Raab has a tough job ahead of him at the Department for Exiting the European Union. Here are some lessons he could learn from his predcessor.
Sex work using the internet is safer for sex workers and easier to police – why would MPs want to change that?
As Chequers places host to a crucial Brexit cabinet meeting, a look back at how British prime ministers repeatedly fell in love with their country home.
Location counts when it comes to sustainable development.
Twin reports from a UK Parliament committee go further than ever in condemning Britain's complicity in the worst of the War on Terror.
Often portrayed as an old plodding cart house, can the TUC become agile again?
Given that so many people have a strong opinion about identity politics, it is surprising how few of us have a clear idea on what it actually is.
A Heathrow expansion is going to benefit the rich and hurt the poor.
Most Leave voters would rather lose Northern Ireland than drop Brexit, reflecting a longstanding indifference.