At the time of writing, there is still uncertainty as to whether the EU Withdrawal Agreement will pass into UK law. The House of Commons is divided between those that want a second referendum (in the hope of a remain vote this time); those that want a more complete break from the EU (including leaving the Customs Union altogether and removing the so called backstop, protecting Irish border control after Brexit); and those that support the current deal.
The latter category is a long way short of the majority it needs; and, worse still, a gap has opened between the position of the Democratic Unionist Party (DUP) and the ruling Conservative Party over the position of Northern Ireland. This threatens the survival of the UK government itself. The political landscape is further complicated by the fact that the Northern Ireland Executive collapsed in January 2017 and has not yet been restored.
Complete article available on the Government Europa website here