The most sensible question I have heard raised by the Trident cost issue, is whether the UK still needs to support the expense of a CASD?
I think it has a point. Where is the enemy that requires a 24/7 watch that could attack out of the blue and require an immediate retaliatory response?
In the case of a rogue state, which of them are bothered enough by the UK to make it the priority target, let alone have a delivery system with the range to hit us?
In most events, of non state actor or a rogue state that might want to target us, would the nature of the attack be such that the identify and responsibility of the attacker would be so apparent that an immediate counter strike would be possible, let alone feasible?
Lets keep a nuclear deterrent by all means, but maybe its time to be a bit more creative and cost effective in the type we use.
Out security environment against WMD attack is currently very good and unlikely to deteriorate overnight, which means that we would have plenty of warning to activate a deterrent to operational status.
One of the best ideas I have read would be to have a fleet of duel use subs that can operate conventional weapons under normal circumstances, but which can be rapidly equipped as Boomers in times of increased threat.
To me such an approach makes sense, as to maintain the old Cold War strategy does; to be honest, appear to be grandiose, somewhat pretentious and rather out of touch with current reality.