The French
Thinking of Courtney's friends the French, how many aircraft do they have on nuclear alert at any one time? Both actually ready to go in minutes and dedicated to the task?
Thinking that this resource, to deliver a supersonic cruise missile with a nuclear tip is above and beyond the MAD solution guaranteed by the submarines of the MN.
Might give a very low baseline for what sort of resources, delivery aircraft, tankers, etc that would be needed, if it was thought to an appropriate route to follow, that personally I don't see, if the RAF was to take over the role.