The rules were changed for the 1924 trials, permitting engines of up to 1,100 cc to be used, and accordingly Frank Barnwell started design work on a competitor early in 1924.

The three aircraft were registered G-EBJK, G-EBJL and G-EBJM on 14 July, and immediately named Jack, Jill and Jim.

After the Lympne trials 'JK and 'JL were delivered to Martlesham Heath for evaluation as a primary trainer, but did not impress the Air Ministry enough for any development to be funded by them.

It was fitted with the newly developed 36 hp Cherub III mounted slightly lower in the fuselage, and the top longerons were curved down more to improve the view from the rear cockpit.

Additionally, a curved decking was added to the rear fuselage, and it was fitted with an enlarged horn-balanced rudder and a new undercarriage using rubber shock absorbers.