I have scratched my head for weeks trying to see the value in buying the new submarines, and even without considering the enourmous amount of expenditure, I can't.
Sure a few jobs whilst they are being done and the retention of expertise, and on the latter, for what?
As far as the Navy is concerned they have great difficulty in maintaing the right manpower to keep our current subs operational.
I suppose in a few years we might be able to tow fresh water from Antartica when the desal plant is snowed under. But on defence the enimies will come on thier individual airborne harnesses.