My Lords, perhaps I may remind the noble Lord of the agreed strength and international safeguard arrangements which we put forward in September 1998, with the International Atomic Energy Authority in a monitoring role. I also remind the noble Lord that last year we pressed the matter very hard at the nuclear non-proliferation treaty review conference, the final document of which spoke of an international unequivocal undertaking by the nuclear weapons states to accomplish the total elimination of their nuclear arsenals. I believe that the Government have attempted to ensure that the threat posed by nuclear missiles throughout the world is taken seriously not only in this country but also by our friends--and those who may not be quite so friendly--overseas.