The Momentum rants about Trident on Twitter highlight just how dangerous a Corbyn government is (and notably, an even greater risk if it's Corbyn propped up by the SNP.)
Under no circumstances should we consider removing Trident. People don't understand the role it plays, and the student union politic types just see it as a "nukes are bad." They are completely incapable of thinking about the issue laterally - it's all "black and white", "good and evil".
The reality of course is that thanks to nuclear weaponry we've had no global conflict since WW2. It absolutely stopped one with Russia and kept that Cold War cold.
And of course, the reason you have to maintain the threat of Trident isn't to actually use it, but so that you never actually have to, because nobody would be stupid enough to risk it.
Global nuclear disarmament is the most ludicrous of political ideals - it can't be put back in the box and, for the sake of millions of lives, nor should it be.