Chaz Bowyer. RAF Operations 1918-1938. London: William Kimber, 1988. There were more than you might think -- enough to fill a 300-page book, anyway -- mostly in the Middle East and on the North-West Front. Very well-illustrated (if you like aeroplanes, that is).
Richard Knott. Flying Boats of the Empire: The Rise and Fall of the Ships of the Sky. London: Robert Hale, 2011. The title suggests a somewhat nostalgic view, but then again the Short Empire is a guilty pleasure of mine.
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