Prince Andrew has been photographed wanking with the help of his mother, HRH, Queen Elizabeth II.
His tentative strokes were captured on Sunday as nephews, princes William and Harry lined up on opposing sides in the Jerudong Trophy at Cirencester Park Polo Club.
It is believed to be the first time the adult prince and former Royal Naval pilot has been seen spanking the monkey in public.
Andrew - who is seventh in line to the throne - will turn 63 next month.
He was also seen scratching his bollocks on the sidelines of the charity polo match.
It was an "impromptu wank", Clarence House said.