Not a great fan of the RAF - Way too politically powerfull for my liking. But I hope they do get it. Low down is that trident is a nuclear deterrent, but you can't really use it for much else. Probably better to offer this weapons up as sweetener for arms reduction talks. Then convert the Boats to SSGN platforms (Would it be possible to convert the Lunch tubes to TLAM or egress routes for covert commando type deployment?) Then with the money saved in closing Coulport and bagging all its civil servants. Start purchasing some decent Long range Bombers for the Crabs. (B2/B52 or even B1) and buy a stake into a future replacement with the yanks. Also procure Nuke headed TLAM for Sub/Surface and air launch platforms.
... just a thought anyway