A landmark decision means the government will not be allowed to trigger Article 50 without putting it to a parliamentary vote.
No member state has ever left the EU, so it's far from clear if one can have a change of heart after starting negotiations.
The way that the EU dealt with its CETA trade deal with Canada makes it clear to Britain that negotiating a free trade agreement will be very long and difficult.
The emerging Brexicon is binary, but this is a deeply complicated situation.
Theresa May desperately needs room to manoeuvre after letting Brexit bravado get the best of her.
This psychologist has studied equivocation for years, but had to invent a new category for the prime minister's unique style.
It's not disrespecting the result of the referendum to criticise the government –or even to call for a second vote.
Just like 'the deficit' before it, this potent term can be used to justify all kinds of changes no one voted for.
The suggested start of Brexit negotiations doesn't do Britain any favours, nor Germany, France or Italy.
The new battle lines on how to leave the EU have been drawn.
The government is taking back control of British law with great eagerness. Here's what to look out for.
Two Germans, a Frenchman and a Belgian: who to watch as negotiations with the UK begin.
The mandarins tasked with making Brexit happen are under strain.
With patience and a degree of moral ambivalence, the UK may find an EU that is increasingly open to the idea of free trade without free movement of people.
The remaining member states are working out how to survive Brexit.
Despite the party's spectacular fall from grace, it's worth noting who is speaking and what is on the agenda.
If free movement of people is not on the table, then neither is single market access.
How might work permits or visas for EU migrants work?
Theresa May is wise to play the long game when it comes to negotiating the UK's exit from the EU.
The road to Brexit looks long and winding, but it seems extremely unlikely that any outcome which threatens the long-term viability of foreign investment in the UK will be tenable.