Was there really an official item "Shed, Aeroplane, for the parking of"?
ISTR seeing the terms "Aeroplane Shed" and "Shed Type..." on airfield site plans from the 1930s/40s period.
The firm which made the canvas Bessonneau Hangars from the First World War - some still in use in the late 1980s - was based in the French town of Angers
https://en.wikipedia.org/wiki/Bessonneau_hangar. Despite the French origin of the word 'hangar' I always wondered whether some RFC erk saw "Bessonneau, Angers" and pronounced the second word with a hard G...