A version of this image is also to be found in Boyle's biography Trenchard Man of Vision (plate facing p. 320). It is credited to the Hulton Picture Library but as neither the Hulton Picture Library (founded 1945) nor its parent publication, the Picture Post (founded 1938), existed at the time of the Independent Air Force Dinner, they cannot be the original copyright holder. As the work is a photograph with an unknown author taken more than 70 years ago, copyright expires 70 years after creation.
{{Information |Description={{en|1=The Independent Air Force Dinner on 14 July 1919 at the Savoy Hotel, London. Left to right are: HRH Prince Albert, Major-General Sir [[w:Hugh Trenchard, 1st Viscount Trenchard|Hugh T