Evaluation of an initial batch of six aircraft, known as Hart Fighters by one flight of 23 Squadron during 1931 was successful, and larger orders followed for the fighter Hart, now known as the Hawker Demon.
После успешных операций 23-ей эскадрильи на 6 новых истребителях, названных Hart Fighter, ВВС сделало большой заказ на новую модель, впоследствии получившую название Hawker Demon.