Prince Harry quipped that his brother William will be envious that he has managed to escape from a "screaming" Prince George.
Speaking as he prepares for a 200-mile polar trek in Antarctica, Harry said, "I think he's just quite jealous I managed to get away from a screaming child."
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The comments are the latest twist in the row between the US and EU countries including Britain over trade tariffs.
St Paul’s Girls’ School in London was criticised by a former pupil over the exercise, which resulted in money going to charities.
‘They kept overtaking each other, so maybe the match will be closer than we expect,’ said Richard Nicholson, of Cannon Hall Farm, near Barns