There’s little doubt that the UK’s ‘independent’ (word used wisely) nuclear deterrent serves little purpose. Against a re-emergent nuclear state (no clues there) we would undoubtedly have the US nuclear umbrella to shelter under ...
Undoubtedly,. yes. My suspicion is many British ban-the-bomb peaceniks think it's OK for Blighty to ban precisely because they know Uncle Sugar won't. Uncle Sugar will be there holding the boom-boom umbrella over them to keep disarmed Britain safe.
– and why would a resurgent Russia want to attack the UK anyway?
"Why can't those vulgar wolves learn to be vegetarians?" said the sheep.
No need to attack if one can get what one wants by intimidation and threats of attack.