If there's anyone out there who thinks that renewing Trident is a good idea, I'd love to know what the arguments for it are. The only three I can see are a) it provides employment - which I'm fairly certain could be done in more cost-effective ways, b) it provides a pretext for the UK having a permanent place on the UN Security Council, and c) it means the French haven't got one-up on us. The last two are pretty specious, surely?
So, what are the other arguments? And specifically, what are the arguments that apply to the UK but not to other constitutional democracies that might also wish to have an independent deterrent, and are as threatened if not more so than the UK? Like, shall we say, South Korea? Unless you think S. Korea should have the bomb, in which case feel free to say so.
Two riders: a) note that I'm asking not about NATO membership, but about Trident specifically; b) even if you don't believe in the arguments, if you know what they are I'd still like to hear them.