If the Admiral-class ships became carriers, what might the Royal Navy do with Courageous and Glorious?
Short answerThey might be scrapped or also converted, but a surface-ship alternative would be to rebuild them as 9.2-inch proto-heavy cruisers.
NotesThe straightforward options are to scrap Courageous and Glorious or convert them into carriers as well. If the Royal Navy instead retained them as surface combatants, they could be rebuilt as proto-heavy cruisers. Treaty limits would probably prevent them from keeping battleship-calibre guns. A battery around 9.2 inches would better fit that alternative role.