Strategic Defence and Security Review

I will come on to deal with that precise point. I have no quarrel with the hon. Gentleman for making it. The current Trident system relies heavily on US logistical, capacity, technological and military know-how. It is nearly impossible to imagine any circumstances in which we would launch a nuclear attack, much less that we would do so independently of the Americans. Likewise, were Britain to be attacked by a nuclear power, the terms of our membership of NATO would require a joint response by all members, including the US.