In 1935, a Scud II flown by Mungo Buxton took the British Height Record for a glider to 8,750 feet (2,666 m).

In 1935, Sir John Carden, an authority on tank design who was interested in gliding, outlined to Baynes his requirements for a self-launching sailplane.

[1] Also in 1935, the Mignet HM.14 Pou du Ciel "Flying Flea" built and flown by Stephen Appleby, was rebuilt by Abbott-Baynes Sailplanes, incorporating modifications designed by Baynes, who had witnessed its forced landing at Heston Aerodrome.

[4][5] During the Second World War, Baynes was the aviation adviser to Alan Muntz & Co at Heston Aerodrome, specialists in weapons systems, and he organised an aircraft division of the company.

[citation needed] He also designed interiors for airliners, invented the vertical lift plane and the high-speed hydrofoil.

L. E. Baynes designed the Youngman-Baynes High Lift Research Aircraft, an experimental flying test-bed for the system of slotted flaps invented by R.T. Youngman.