The Brexit Campaigners caused this situation by campaigning for an action without any in-depth study of the problems it would invoke, and without any kind of plan as to how to enact it successfully - hence the "Oh fuck!", rabbit-caught-in-the-headlights looks on the faces of Bozo the Buffoon, Haddock Face, and The Lying Scottish Viper as they shat their boxers and ran for the hills the morning after the vote.

The UK have created the problem of the Irish border by baling out of the EU. It is a matter of logic, therefore, that it's the UK's responsibility to put forward a workable solution acceptable to all sides.