Sadly I fear that the idea of having two big carriers like that is totally misplaced. Where will all the staff to man them come from? I predict that we will never see both in commission at the same time. As was said earlier what we really needed was another three carriers to replace the three we just scrapped. They were about the right size to be capable of being deployed to incidents (Disasters as well as conflicts) world wide.
Remember too that the Royal Navy is not just about carriers, we also need to man up one or two frigates and smaller vessels too!