I shall ask the noble Lord a question that I would have liked to have asked the noble Baroness, Lady Hoey: would he prefer a customs frontier across the island of Ireland, with all of the implications that would have for the Good Friday agreement?
I think that Northern Ireland, which we are constantly told is an integral part of the United Kingdom, should be treated as such. If you own a farm, it is your responsibility to fence your livestock in; it is not my responsibility as a neighbour to fence your livestock out.