How would the fighter for the RAF of 1943 would've looked like if you were to design it? The plane should be in service by mid of 1943, so it can take part of invasion of Sicily and further. The airframe should allow for more than one kind of engine to be installed, and an easy conversion for FAA needs. If one thinks that RAF was already in a possession of an ideal fighter, I acknowledge that in advance Approach that would look beyond a license-built P-51 or F4U is encouraged - the design should start from a clean sheet of paper, but using historical engines armament.