That is the perennial argument javelinfaw9 and there is no doubt that most of our Nato allies are in that position (ie no nukes) so why shouldn't we be? But the whole question of the ruin of the nation depends on the fact the the aggressor nation (ok lets call it Russia) knows that it will be toast too if that happens, and that is what it stops it toasting us (or our allies). It only needs one NATO country (ok lets call it the USA) to have nuclear weapons, and to state that it is willing to use them. It doesnt really matter if Corbyn says he is going to continue to have a guard dog, but state that it will remain chained up and muzzled, as long as the "enemy" knows that our most powerful ally has one, and it is most certainly unchained and unmuzzled. That's what they call having a nuclear deterrent