The Recommendation Letter has been Attached.
There are now four nuclear-armed submarines in service with the Royal Navy, all of which are armed with nuclear weapons. It is imperative that the nuclear payloads of these submarines be made available in the event that there is a nuclear exchange. This could be a very dangerous situation. Having stated that, the prime minister is the one who needs to issue the instruction.
Each submarine commander receives a letter in a sealed envelope that contains specific instructions on what to do in the event that the prime minister or any other senior member of the government is unable to give authorization for a nuclear attack. This is done in the event that the prime minister or any other senior member of the government is unable to give authorization for a nuclear attack.