What’s stalling Brexit talks between EU and UK? The Irish border issue explained
Main disagreement between London and Brussels is on how to keep the Irish border open after Brexit

Britain’s Prime Minister Theresa May faces a Brexit showdown with frustrated EU leaders Wednesday with talks on agreeing an orderly break-up at an impasse.
This week’s summit in Brussels was billed as a “moment of truth” for negotiations on Britain’s exit from the bloc but it seems the truth is that the two sides just cannot agree.
However, the main sticking point in Brexit negotiations is how to keep Britain’s land border with the Republic of Ireland open after it leaves the European Union.
London believes frontier checks can be avoided through a new trade agreement with Brussels, but accepts the need for a fallback plan to address the issue until that deal is agreed.
However, the two sides have so far been unable to agree the terms of this so-called backstop.
Why is this an issue?
After Britain leaves the European Union, the land border between the British province of Northern Ireland and the Republic of Ireland will become an external EU frontier.