Next the negotiations begin, and Britain has two years to negotiate a trade deal with the EU if it wants to avoid the WTO cliff edge.
The starting gun has been fired but political pressures on both sides of the Channel make a settlement a tall order.
The two-year period for withdrawing from the EU has been launched, so what happens next?
Five principles of bargaining to help you understand what's going on in the Brexit negotiations.
For all their defiant talk of 'business as usual', savvy leaders know that any good response to a crisis is also an emotional performance.
Motivation is what separates an act of violence from an act of terrorism, and we don't know what drove Khalid Masood to kill.
She's worked hard to get where she is, but the prime minister lacks vision and fails to inspire.
Whatever you think of her politics, May's decision to rise above divisive tough talk was an admirable one.
The former deputy first minister was once a feared IRA sniper but became a central figure in the move towards peace.
The empire's formal structures may have been gutted, but its influence lives on.
The former Chancellor is by no means the first to walk the line between media and political elite.
The upsetters have achieved their founding ambition, now they need to work out what to do next.
After Brexit, we need inclusive conversations.
It's the biggest financial penalty ever paid by a British political party. Here's how the story unfolded.
With Spain spying an opportunity and major questions about economic stability, Brexit is causing sleepless nights on the Rock.
Changes to the national insurance tax for self-employed people was one of the most controversial parts of the 2017 spring budget.
He came to power promising a new kind of politics but has spent his tenure plumbing new electoral depths.
Philip Hammond delivers his last Spring Budget on the state of the UK economy. Our panel of experts dissect what it says.
Peers have sent the Brexit bill back to MPs with changes calling for a vote on a final deal, and the protection of EU nationals in Britain.
The debate about what role the Lords play in Brexit is potentially based on a misunderstanding about what the upper house actually does.