The UK's no-deal tariff plan was viewed in Dublin as a way to scare Brexiteers into supporting Theresa May's deal.
How to make sense of the UK government's no-deal Brexit contingency plans to avoid a hard border in Ireland.
What do Theresa May's last minute Brexit guarantees mean for the Irish border?
The history of smuggling across the Irish border.
Why much of the fate of the Irish border lies in the future of the UK's customs arrangements with the EU.
The Northern Ireland Assembly will be consulted on the backstop, but there will no veto.
The EU doesn't want a temporary solution to become permanent.
An EU law expert on what the attorney general's legal advice on Brexit means and its wider significance for the future.
The two countries have successfully collaborated on electricity supply for 11 years, but could Brexit pull this unique UK-Ireland innovation apart?
As the divorce part of the Brexit negotiations approach their endgame, attention is turning to the future relationship between the UK and EU. The view from EU capitals.
While one of the most contentious Brexit issues, politicians forget the essential human aspect of the border as a place that is lived in and loved.
The events of the war caused Irish nationalists to push harder for their independence.
There's really only one option here, and the UK needs to do some very savvy PR to sell it to Brexiteers.
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.