European Union (Notification of Withdrawal) Bill

I thank the hon. Gentleman for his graciousness in allowing me to intervene. He and many of his colleagues have claimed that the decision to leave the EU will mean we can take back control of our borders. Can he gently and slowly explain to those of us in Northern Ireland how he is going to take back control of the border, which stretches for about 300 miles, between the Republic of Ireland, which remains within the EU, and Northern Ireland, part of the UK and which therefore will be coming out of the EU? How do we retain control of that?