Claim: The Civilian Coupé is a two-seat private aircraft from the United Kingdom designed by Harold Boultbee and first flown in July 1929.
Evidence: The Civilian Coupé is a British, single-engined two-seat private monoplane built starting in 1929. A monoplane is a fixed-wing aircraft configuration with a single main wing plane, in contrast to a biplane or other multiplane, which have multiple planes. Harold Boultbee July 1929