Well... no need for catapults for the unfortunate aircraft on that hybrid monstrosity.
Just put sails on them, and let the gun blast launch them overboard !
Or better, catapult the aircraft and then, as it pass over the turrets (below the dec) - fire the guns. The deck will bent upwards with the blast, launching the aircraft upwards ski-jump style !
The hybrid was clean sheet design, not an attempt to save the Lions (On which design work continued on the original 1939 design until 1942) but was instead the result of an unsolicited proposal by the Director of Air Material in 1940 to add a hangar containing ten fighters and a short flight deck to the KGV class. This idea was then sent it the Director of Naval Construction, who then drew a number of hybrid designs ranging from Battleship Carriers to Aircraft Destroyers, none of which were acceptable, and the concept did in October 1941.That proposal was based off of the Lion-class battleship as a means to save the program which was getting cancelled. The battleship was round about the size of the Iowa-class.