"Has Corbyn said that would never be willing to approve the use of nuclear weapons? YES or NO"
Hopefully no - the existence of nuclear weapons is contradictory - the reality that countries have them is a threat to others who also have them (a sort of deterrence), but the actual use of them inevitably and unavoidably against millions of civilians would be nothing other than a mindless act of vengeance and only monsters would ever carry out such an obscene act of mass murder.
The only person in authority ever to have actually proposed such an obscene act in a wartime situation was General Westmorland who suggested that America "nuke North Vietnam back to the Stone-age".
The reality of the dangers of possessing nuclear weapons was when Israel attempted to persuade Apartheid/fascist South Africa to obtain them and offered their assistance in doing so.
I've never been sure whether this was one extremist state attempting to unite with another with similar views, or simply "business" - worth remembering that Israel has developed a lucrative drone industry.
The further to the right the world moves, the greater the threat to humanity from these obscene and unusable weapons - which is why I'm more than happy to be referred to as "comrade" by two right wing extremists - thanks for the compliment.
No sane military group or political party would ever use these weapons - it is obvious to all that their use would destroy the planet.
Jim Carroll