If Q's reference to D5 does refer to a trident then I suspect an AF1 takedown FF would be small potatoes (also not the right package). Trident is a thermonuclear strike system, so that and Hawaii could have been real attempts to nuclear strike the US or Russia as a FF. So they could bomb the fuck out of each other.
Same goes for the British test 'going wrong'. They would launch close to the US as that is what a foreign nuclear sub would do.
>THESE PEOPLE ARE SICK