The authors interviewed David Cameron in 2013, and he discusses the task of writing sealed instructions to Navy commanders, to be opened in the event of a nuclear attack. Cameron reaffirms his own commitment to the nuclear deterrent, though he admits that the policy may be revised by future generations: "it's not unthinkable at some time in the future someone will come to a different decision. I don't think Britain will give up nuclear deterrence altogether. I think that is out. I'd be very surprised if that happened in my lifetime."