MPN11
PS ... how/when did KG V earn his wings?
He didn't. Although George V wore the pilots brevet on his uniform he never trained to fly. The Duke of York (later George VI) served in the RAF 1918-1919, gaining his wings in 1919. He was followed by his brothers Edward Prince of Wales (King Edward VIII, later Duke of Windsor) in 1929 and Prince George (later Duke of Kent) in 1930.
ISTR Royal flight training at the time took place at Northolt.