I wonder how it works in practice. I share the scepticism that the UK can fire these independently. But then, from a purely technical PoV, you'd imagine these

I wonder how it works in practice. I share the scepticism that the UK can fire these independently. But then, from a purely technical PoV, you'd imagine these missiles can be fired: - from underwater, away from radio reception - as a second strike weapon, i.e. with command centres destroyed So here's the dichotomy. If these assumptions hold, then the UK must be able to fire the missiles independently - they seem to work offline. And if they don't, then they are even more useless than I thought. Essentially they would only be good for a first strike, approved by the US, or second strike in a sub-global conflict, not even for a NATO-wide defence in an all-out war. I can't see a third way. Maybe US satellites which would diffuse a Trident in-flight if the US says so?