Larger alternatives to the Malta-class carrier

Was there a roughly 290- to 300-meter variant of the Malta-class aircraft carrier?

Yes, larger versions appeared in the initial design study, but Britain selected a smaller option before those concepts advanced.

Larger Malta-class alternatives did appear in the early design study, but they went no further. The selected design fits a recurring British preference, as described here, for the second-smallest option. Admiral Henderson's influence meant even that choice retained substantial size and capability. The full study therefore reveals more ambition than the ship selected for development.