The UK leases the missiles from America, where they are made, maintained and tested. Our four submarines have to go to the American naval base in Georgia to have the missiles fitted. That is a fact. It is of course said by those who support renewal that we have “operational independence”. Bearing in mind that we do not own the missiles but lease them from America, I just do not believe that there is any scenario in which a British Prime Minister would authorise a submarine commander to use the nuclear weapons anywhere in the world without first notifying the Americans.