G T R Hill designed and Westland Aircraft built them.
In the 1920's aircraft were pretty basic, maybe crude is a better word so the pilot had to be on top of the situation constantly and know what to do when the shit hits the fan.
But in those early days a lot of novice fliers were dying when their plane stalled and spun to the ground. Not the engine stalling, the plane stalling and has no lift to keep it up. Lift is generated by air moving over the top and bottom wing surfaces so when the air stops moving the lift goes away.
Hill tried to design a plane that was hard to stall giving novices a chance to recover from mistakes.
There were Types I, IA, II, III, IV, VI, VII, VIII, and fighter designed but not all were built.
He and his wife built the type I which was a glider the added an engine to create the IA.
VIII was to be a 5 engine transatlantic flyer, but wasn't built.
This one is a IV built in 1931 serial K1947.