What does my right hon. Friend mean by "many years yet"? Does it represent a departure from the view of the previous Conservative Government that Polaris had an effective life until the late 1980s? If it represents a departure from that view, what has happened to enable the Government to depart from that view?
I have explained to the House on more than one occasion that maintaining the effectiveness of the present deterrent may necessitate further tests and I have indicated already that there may be—I put it no higher than that—a need for another test some time next year.