Negotiations are at a crucial stage, yet this central question remains unanswered.
Brexiters are arguing for Theresa May to abandon her Chequers deal and push for a Canada-style trade agreement with the EU.
The question of the Irish border remains at the centre of Brexit negotiations after an informal summit of EU leaders in Salzburg.
Is the UK's Brexit plan enough to avoid a hard Irish border?
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.
Two years after the Brexit referendum, Cabinet members apparently agreed on the country's vision for its future relationship with the EU. But it has already led to a flurry of resignations.
When Northern Irish people were asked to choose between two scenarios for the post-Brexit border, they opted for one in the Irish Sea – with conditions.
A tale of two 'backstop options' for Northern Ireland after Brexit.
To mark the 20th anniversary of the agreement that brought peace to Northern Ireland, this episode of the podcast looks at its history, its legacy and the impact of Brexit on its future.
An expert in trust assesses how it comes into play while finding a solution that avoids a hard border for Northern Ireland.
The EU faces three key challenges over Brexit: avoiding a no-deal scenario, managing the ticking negotiation clock and ensuring its own unity.
Other EU countries have flexible legal arrangements for their own special territories – something similar for Northern Ireland is not impossible.
Options to avoid a hard border are on the table, but they remain unpalatable to Theresa May's government.
The DUP should take note: free travel and trade between Northern Ireland and the Republic may hinge on legal arrangements.
Brexit negotiations threaten the peacebuilding efforts that have taken place since the Good Friday Agreement.
The Northern Irish party were horrified at the suggestion that Brexit might mean different customs rules. But when it comes to women's rights, it's a different story.
European leaders agree that agreements on issues including the Irish border mean it's time to start moving forward with Brexit negotiations.
Theresa May has reached an agreement with the EU that will enable her to proceed to the second stage of Brexit negotiations. Here's what it all means.
The latest Brexit talks would offer a masterclass in how not to negotiate if they weren't so lacking in complexity.
After decades of diplomacy and development the two economies of Ireland are more integrated than they have been in a century.