The FAA operated a total 2,012 Corsairs, none were operated by the RAF as far as I am aware. The FAA Corsairs originally had a camouflage scheme with a Dark Slate Grey/Extra Dark Sea Grey disruptive pattern on top and Sky undersides, but were later painted overall dark blue. Those operating in the Pacific theater acquired a specialized British insignia — a modified blue-white roundel with white "bars" to make it look more like a U.S. than a Japanese Hinomaru insignia to prevent friendly fire incidents.
Some history of the FAA Corsairs here, and photo of original camouflage scheme
Chance-Vought Corsair F4Uaircraft profile. Aircraft Database of the Fleet Air Arm Archive 1939-1945