PR I (Type A)
Engine: Merlin III
Wing: A
Cameras: Two inboard guns replaced with downward-pointing cameras
PR II (Type B)
Engine: Merlin III
Wing: B
Cameras: Two vertical cameras in blisters under the wings
PR III (Type C)
Engine: Merlin III
Wing: B
Cameras: Two cameras in a blister under the starboard wing
PR V (Type E)
Engine: Merlin III
Wing: B
Cameras: Oblique camera in the fuselage
PR VI (Type F)
Engine: Merlin III
Wing: B
Cameras: Various low and high-altitude configurations
PR VII (Type G)
Engine: Merlin III
Wing: B
Armament: Mk Ia armament retained
Cameras: Oblique cameras in and under the wings
Notes: These types were converted from Mk Is with the changes shown. The Type B carried an extra 84 gallons of fuel in place of ballast, the Type C had another 30 gallons in the port wing blister. The Type G was for low-level reconnaissance and retained the guns and armour of the Mk Ia. The D and F variants took longer to develop and the D was to become the PR IV.