Dr Julian Lewis: I welcome the right hon. Gentleman [Alex Salmond] back to his place in this House. May I appeal to him not to conflate two separate issues? They are indeed separate issues. One is the very real concerns about faulty operating practices leading to potential accidents. The other is the wider issue about whether or not we should have a nuclear deterrent. It might surprise him to know that many of us who believe that we should have a nuclear deterrent are as concerned as he is about the dangers of operating faults and accidents in the systems that we have.