You proved that the reason nobody has nuked North Korea, despite breaking UN nuclear laws is because China has declared they would intervene if anyone did. M.A.D.
The UK is a part of NATO but one of the stipulations is that we have nukes. No nukes, no NATO. Some nations aren't bound to this law but we signed one that meant we had to have them for the tactical advantage it gave the US. Corbyn hates nukes and wants rid. Will we then have to leave NATO? Can we still be a member without our nukes? Would we still be protected by them? What's our defence against a nuclear aggressor should one develop?
Corbyn is anti-nuke and not exactly pro-NATO going by his speech in 1989. What would happen? He hasn't given a clear answer. For the record, I don't care, i'm pointing out that many people do and until he gives a clear answer, people will continue to debate him on this issue and it's one that could potentially hurt his bid for No.10.