The HMS Hermes was the first British warship to be designed from the start as a carrier and to have an island.
At the time it was felt that the aircraft carrier still had to defend itself against surface ships as it wasn't felt aircraft alone could. The HMS Hermes was intended to operate with cruisers and its aircraft act as reconnaissance.
At the rear of the flight deck was a hump that was intended to slow down landing aircraft.
The flight deck had a bump aft that contained the lift.
The hangar was 400' long.
The superstructure caused the HMS Hermes to be unbalanced. The ship had to have several compartments flooded to make her trim.