The Prime Minister stated that when we leave the EU at the end of this year Northern Ireland will still remain a full part of the United Kingdom. But I have in my hand a letter received by the management of the port of Larne only this week, stating that it has to prepare to become a border control post, and 14 acres of land has been looked at for car parking, for lorry parking and for construction. There is a sense of urgency, as the proposals have to go to the EU by the end of the month. Can the Prime Minister explain how Northern Ireland can remain a full part of the United Kingdom if people coming from the rest of the UK into Northern Ireland have to pass through a border control post? Would he advise management to tear this letter up as well?