Of course with any CV we need to suficient escorts to be able to protect it and RFA's to sustain it on long deployments. And with the current appetite for cuts and 'Savings' we won't have the capability to support them if we ever have to deploy them to the other side of the world.
Looking at the way the armed forces is going it won't be to long before the requirement will be for all kit to be able to fit in the back of a C-17.