Teeteringhead - I seem to recall reading somewhere ("Action Stations" ?) that they were named after the nearest Post Office, unless to do so would cause confusion with another military establishment.
Krystal - Don't know about MUs, but try the Yorkshire Air Museum at Elvington for your hangar. They have a document there listing all (?) military airfields in the UK together with a sketch showing the layout and a page or two of other details. It represents one gentleman's life's work and I guess you would have to inspect it in person (it's quite a large display in its own right) but if you ring they might at least tell you if Honiley is in the document.
Having said that, if it's a T2 hangar it could well have been disposed of as surplus after the war, dismantled and rebuilt on another site ("T" = "Transportable").
Stuart.