I will be happy to talk about the essential tests of necessity, which are well recognised and well set out, as my hon. Friend knows. But the principle behind the amendment, which I will then go
into the detail of, is precisely to say, “If you are invoking that doctrine, a most unusual thing to do, you ought to come to the House and set out the basis upon which you seek to do so.” The House would then have the chance to say whether or not we were prepared, on the basis of what the Government had put before us, to take the very exceptional step of putting ourselves in breach of a treaty obligation. That is the point.