Blackburn B-25 Roc was a “fighter” development of the Skua dive bomber using the same turret fighter concept using the Boulton Paul Type A power operated gun turret as the Defiant.

The type operated briefly in small numbers from the aircraft carrier HMS Ark Royal. During the Norwegian campaign of 1940, 801 Squadron brought three of the turret-fighters aboard along with its Blackburn B-24 Skuas although they were little used due to their low performance and poorer endurance.