If we are to continue with possession of the nuclear deterrent, it will be right and proper that the House ensures that the highest safety standards are followed on the maintenance and transportation of such weaponry, especially where submarines that carry nuclear weapons travel through traditional fishing grounds. Will my right hon. Friend confirm here and now that there was no nuclear submarine in the vicinity of the sinking of the Kirkcudbright scallop dredger, the Solway Harvester, because many people in Scotland believe that the vessel went down with the loss of its seven-man crew because it was in collision with another vessel, perhaps a nuclear submarine?