Kronfield Monoplane.
Is not the Kronfield Monoplane and the B.A.C. Drone are the same bird?
As I understand it the British Aircraft Company. (B.A.C.) of Maidstone during the early 1930s built a series of gliders culminating in the B.A.C. VII tandem two-seater. In 1932 they fitted a 600 cc Douglas flat-twin motor cycle engine and an undercarriage to a B.A.C VII glider. I 1933 the designer was killed flying one of the development aircraft. The firm was then taken over by Robert Kronfield and an aircraft with a streamlined engine pylon and renamed the Drone was built and demonstrated. The company was renamed Kronfield Ltd in 1936.