Prince Harry "blew royal protocol out of the way" when he released a statement in Meghan Markle's defence in 2016.
According to The Sun, Harry released a statement about media harassment directed at his then-girlfriend just days after their relationship came to light.
But the outlet reports that it blew his father Prince Charles' week-long trip to the Middle East "out of the water".
The BBC's new documentary on royal reporting, The Princes and the Press, reveals that journalist Robert Jobson had promised Prince Charles the front page of the Sunday Express about his work in the Middle East.
He told the cameras, "When you're on a trip, say with the Prince of Wales in the Middle East, and all of your negotiations for a week to get the chat with the Prince of Wales, to say, 'We guarantee you the splash,' all goes out the window because Harry releases this big statement about the press and about their treatment of Meghan was outrageous."