I was a very young co-pilot on Valiants at Wittering in the late 50s. I understood that, just before I arrived, the Burleigh hunt had held up operations when it crossed the airfield in full cry. Apparently, when the land was compulsorily purchased from the Lord of the manor during the war, the scribes failed to include his ancient hunting rights in the paperwork, so the hunt was within its legal rights. I make no claim as to the truth of this story but it was quite current at the time. That may be the source of the painting in question.