I was watching the old "Hole in the Ground" film (for reasons we won't go into, but suffice to say it wasn't prompted by the resurgent North Sea Bear population
) where after a limited strike, the Observer Corps are plotting fallout drift. The 'phone rings, apparently it's the RAF wanting to know which airfields are safe to use. Now to the question. This is presumably post V-Force strike as we've already seen the white beast rocketing skywards. Was the Vulcan (in particular) NBC proof in the modern sense and, if so, could it be turned around for a second go under fallout conditions or not?
I know I'm going to get a finger-wagging for asking such "special" questions, so ducking now! Don't need detail, just satisfying the old grey cells (or should that be Green cells?)