Thankfully, this is a speech that the monarch never had to make. Or at least, not yet.
Although it was only a simulation, the text of the Queen’s address – written as if broadcast at midday on Friday 4 March 1983 – seeks to prepare the country for the ordeal of World War III.
The script, which starts off by referring to the Queen’s traditional Christmas address, reads: “The horrors of war could not have seemed more remote as my family and I shared our Christmas joy with the growing family of the Commonwealth.
“Now, this madness of war is once more spreading through the world and our brave country must again prepare itself to survive against great odds.