One of the biggest challenges we face in our free and open democracy, where international travel is common and affordable for many people, is that that makes us vulnerable. The 900-odd people who travelled to Syria did so predominantly on scheduled flights from this country, and a number of those who have returned came via, for example, Turkey, often using flights from holiday resorts. We do our best to analyse passenger records, to prevent people from leaving this country or to stop them when they return, to examine their digital material and question them, and if possible to prosecute them.
The hon. Gentleman is right: the land border of Northern Ireland is a challenge. We work with the Irish Government to keep the island of Ireland’s border safe;
we share intelligence and data where we can. The free travel area is exactly that, and in the past some individuals have used the Northern Ireland border to return to the United Kingdom. That is why we have always had some forms of control on the Northern Ireland border. He will know better than anyone in this House that it has never been the case that nothing has gone on at that border. The controls may have varied and been less solid, but there have always been checks on and around the border, and we have used those powers in the past.