So apparently the UK Trident nuclear defence system would be launched if the submarine was unable to pick up Radio 4, as this would be taken to indicate the UK was no longer a functioning state – see journalist Simon Rickett’s tweet below:
Interesting detail I didn’t know, The signal that the UK is no longer a functioning state – Radio 4 cannot be heard. pic.twitter.com/hRJs2tpPBy
— SimonNRicketts (@SimonNRicketts) September 30, 2015
