Good luck with this build. I'm really glad Airfix took notice of current research and put the correct squadron codes on the decal sheet for Scarf's machine.
Ever since the 1960s, when Chaz Bowyer incorrectly identified a 27 Sqn Blenheim as the one which Scarf flew, we've seen repetition of L1134 being shown with the codes "PT-F". There was a long discussion on Britmodeller after the discovery of a Japanese photo that actually showed "PT-F" and it had an entirely different serial number. It also wore the Far East Command "day fighter" identification markings of a Sky Blue band around the rear fuselage, and the starboard wing underside painted probably) Sky Blue.