Not exactly the same but...
There was an incident on the A303 west of RNAS Yeovilton and as I recall on the Ilminster bypass (when it was two lane and not three). And as I recall this was in the spring or summer of 1988. A student in a small sports car crashed into the heavy vehicles carrying the nuclear weapons being transported from somewhere in England down the A303 and onwards to Devonport.
Overnight crash? Student was killed. I saw the car in a local garage at Tintinhull.Flattened, poor young guy.
Cant remember much more about it. Bet you many such things have gone on. Crazy, in retrospect.
Cant even remember why we had these weapons. Were they air dropped onto submarines? Seems crazy now, as all conflict does with age.
Not secret, this was in the papers.