The current dissertation aims to analyse Britain s exit from the European Union and its impact in the Irish border, an issue that becomes more vital by the day. The aim is to understand how two divergent perspectives — the EU s and the UK s — are inserted into the framework created by the peace process, and how the aforementioned divergence can influence Brexit s end result. We conclude that UK s red lines, drawn from the 2016 referendum, are incompatible with an open border in Ireland, an integral part of the peace process and one of EU s red lines. Without a change in negotiation priorities and the resolution of the current political dilemma, caused by the lack of a common focus in Westminster, the UK can crash out of the EU without a deal, which would be catastrophic for the peace process.