Elliotts of Newbury were experienced wartime glider manufacturers but at the end of World War II decided to venture into the design and production of powered aircraft.

The prototype Eon 1 registered G-AKBC powered by a 100 hp (75 kW) Blackburn Cirrus Minor engine first flew at Welford, Berkshire, on 8 August 1947.

[2] The aircraft, which had been designed for a more powerful engine, proved to be underpowered with the Cirrus Minor and unable to carry four people.

[3] After initial testing was completed, the prototype was modified to reflect the planned production version.

The main changes were a new engine, a de Havilland Gipsy Major of 145 hp (108 kW), and a lengthened nose-wheel leg.