The Commission is negotiating the terms of the UK’s withdrawal; yet the subject matter on which we are all stuck is not entirely within the jurisdiction of the EU.
Under international law, it can only be a temporary arrangement – and this must be put in explicit, legally binding, terms.
There is plenty of reason to check that the Government’s ones have been giving sound legal advice to ministers. Too often, it has been wrong.
Dublin is in danger of setting conditions that Westminster cannot meet. Instead, we must return to our historic willingness to navigate difficulties together.
The problems that change throwns up for the two countries are formidable but not insoluble.