How about this one as a RAF perk, prototype flew on May 23 1944.
Martin-Baker M.B.5
"The M.B.5 was powered by a 2340 hp Rolls-Royce Griffon 83 twelve-cylinder V-type liquid cooled engine driving two contra-rotating three-bladed propellers. Armed with four 20-mm British Hispano Mk. II cannon in the wings. Maximum speed was 395 mph at sea level, 425 mph at 6000 feet, 460 mph at 20,000 feet. Initial climb rate was 3800 feet/minute. Climb rate at 7000 feet was 4000 feet/minute. The airplane could climb to 20,000 feet in 6.5 minutes, and could reach 34,000 feet in 15 minutes. Service ceiling 40,000 feet. Weights were 9233 lbs empty, 11,000 lbs normal loaded. Wing area was 262.64 square feet."