Don't be silly, old boy. The Royal Navy, just like every other Navy, prefers to stick to the tried and tested ways of doing things. Carrier superstructures have always been halfway along the side of the boat. That's where they go, see?
The superstructure could in fact disappear altogether. All you really need above the flight deck is a set of remote handling controls (retractable) for docking, and perhaps a place to mount the radar aerial(s). Otherwise the ship and flight operations could easily be managed from an office somewhere in its bowels, with sponsons on each side for those who simply have to look at the sea from time to time, as they are now.
But The Royal Navy has managed its ships from raised platforms since Samual Pepys was first appointed and the telescope was the best means of target acquisition and shouting was the only way of communicating, and who would be so foolishly revolutionary as to propose a change?