Four brothers named Moss built the attractive MA.1 two-seater in Chorley, Lancashire in 1937, intending commercial production. In 1938, G-AEST reappeared as a sports model with open cockpits and writer Ben Dunnell thinks this may have been a new airframe; see Alan Scholefield's photos from 1950 when it was a racer with the rear cockpit covered.

The sole M.A.1 ready to compete in the Goodyear Trophy race as No.4. It crashed fatally an hour later at the Newport (Shrops) turn, with the loss of the aircraft and pilot W.H. Moss. The sole M.A.2 G-AFMS is next in the line-up.

The sole two-seat Moss M.A.1, built at Chorley, Lancashire, in 1937. Competed in UK air races, but was lost in a crash in the King's Cup race held at Wolverhampton (Pendeford) on June 17, 1950, when W.H.Moss was killed.