Negotiations are at a crucial stage, yet this central question remains unanswered.
If the UK does secure a deal with the EU, it's not clear that parliament would back it. Here are some scenarios for what could happen next.
The question of the Irish border remains at the centre of Brexit negotiations after an informal summit of EU leaders in Salzburg.
Children growing up in Northern Ireland are far less likely to be in foster or residential care than those in England, Scotland or Wales.
Belgium held the previous record with 541 days without a government. What's holding up power-sharing?
The only way forward is a more inclusive unionism that reflects the diverse and multicultural nature of the UK.
The white paper, which outlines Britain's vision for Brexit, does make independent trade deals tricky.
Is the UK's Brexit plan enough to avoid a hard Irish border?
It sparked a series of government resignations, but what's actually in Theresa May's Brexit plan?
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.
Most Leave voters would rather lose Northern Ireland than drop Brexit, reflecting a longstanding indifference.
Female suicide rate in Northern Ireland is high, and ambivalence about legalising abortion is likely to make matters worse.
A tale of two 'backstop options' for Northern Ireland after Brexit.
The fault lines between highly segregated neighbourhoods have been linked to higher crime rates and mental health issues.
Recent political events have raised the subject of Irish unity once again. But several issues need to be addressed first.
After Brexit, politicians hope that technology can help us avoid a hard border in Ireland.
The British cabinet is split over whether to impose a statue of limitations on investigations into alleged crimes by former soliders in Northern Ireland.
Twenty years since the Good Friday Agreement, it remains easier to rely on old animosities than lead people towards peace.
The agreement created peace between Irish nationalists and those who support being part of the United Kingdom. With Brexit looming, tensions are once again rising.
The Good Friday Agreement was choreographed 20 years ago to maximise support for the deal.