Glojo,
Whatever it is you are smoking, pass it round!
There is little connection re the carriers and the escort numbers in terms of UK funding. If we did not have the carriers then we would still only have 19 frigates/destroyers, if that number. Certainly, without CVF you do not need the T45 (well maybe 2-3 max to protect the amphibs).
To me CVF and the amphibious case go hand-in-hand and both are about projecting power from the sea base (ie no host nation required - always the thing that limits political choice) - and this is why the RN will be happy with the B version. And, quite honestly, why it has to "own" both capabilities.