If we don't have nuclear capability there will be no deterrent against others using nuclear weapons against us as we can not retaliate what so ever.
The point is to deter others from using them, unless they want the same or worse back.
Who is going to use these weapons against the UK exactly?
There is plenty deterrent, for the world would be a waste ground if it ever happened. Trust would be gone, safety and wellbeing would be gone. It would be armaggedon. No one would ever stand back, on either side of the divide, and let someone start attacking the other. It would unravel the stalement and unleash an almost unstoppable domino effect.
Anyone seriously putting forward the point that if we did not have these we would be glowing bright green/yellow next year is somewhat missing the point.
We would be at no greater risk now, if x nuked the UK then what is stopping them doing it to France, Europe etc etc. Other countries would probably start a retaliation regardless if we had a nuclear retort or not.
I find all this far too fanciful to take seriously, the only reason we have these is to try to hold a slice of world power.
Politicians can't actually come out and say that, so they make up **** like Saddam and other places in order to set a tone into which we can pretend we need them.
We don't, the UK is not at threat from ICBM warfare.
What good are 13,000 mph nuclear warheads against a man with an AK47 and bomb vest or a 'dirty' shipping container ?