Any Brexit that takes Northern Ireland out of the customs union will have a significant impact.
With the border between Northern Ireland and the Republic a sticking point, negotiators could pick up some tips from how it was done last time.
Is there light at the end of the Brexit talks tunnel?
In the 1970s, the British army struggled to contain the subversive activities of members linked to paramilitary organisation.
Since the Good Friday Agreement, political dialogue has opened up along the Irish border.
Northern Ireland has a tourist circuit steeped in death and disaster – is this a good thing?
The European Commission has published its guidelines for talks on this thorny issue.
A judge in Belfast has dismissed a challenge to Northern Ireland's ban on same-sex marriage citing it as a 'social policy' issue.
The UK government continues to insist there will be no physical markers on the border. But how can that work?
Ireland's new leader has a warning for those who want a hard border: come up with a plan, or EU talks will stall.
Political tensions are mounting over the future of the border between Ireland and Northern Ireland.
A depressing ruling from a Court of Appeal and a triumph in Westminster all at once.
An exclusive interview with Norman Tebbit on Thatcher, Brexit, Theresa May's potential successors ... and a certain former chancellor.
A generous funding package for Northern Ireland has gone down like a lead balloon in other parts of the country.
The unionists have pledged to back up the Conservative government in exchange for an extra £1 billion for Northern Ireland
The issue of an Irish Language Act has been a sticking point at Stormont.
Northern Ireland remains out of step with the rest of the UK when it comes to accessing abortion. Now the people behind that have become extremely powerful.
The Irish nationalists now have seven MPs but they have historically refused to attend the Westminster parliament.
A deal could have huge implications for Brexit and politics in Northern Ireland.
This is not the first time a Westminster government has needed support from unionists.