Queen Elizabeth II is not believed to be fond of Prince William traveling by helicopter with his family.
An insider previously told The Sun, that the monarch is worried about her grandson flying.
Royal expert Russell Myers weighed in on the issue on ITV's This Morning, the Express reported. "There's an old age rule that members of the Royal Family don't travel together and the reason is because, if disaster did strike, you would potentially have the line of succession absolutely obliterated," he explained.
"The Queen has apparently had a quiet heard in William's ear and said, 'it's about time to take your hand of the controls, split the family up when you are travelling whether it's up to Norfolk or abroad,'" Myers continued. "The reason is if with the Cambridge, unfortunately, tragedy did happen, we would see Prince Harry having to come back and take the line of succession."
"Obviously that would be quite a hot potato with the Sussexes leaving the Royal Family and setting up home in America," he noted. "He'll do what his granny asks him, I'm sure."
The Sun insider had told the publication that she knows her grandson is a "capable pilot," but she "does not think it is worth the risk for all five of them to carry on flying together and can’t imagine what would happen. It would spark a constitutional crisis."
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William and his wife Kate Middleton share children; Prince George, 8, Princess Charlotte, 6, and Prince Louis, 3. The 39-year-old's father, Prince Charles, is ahead of him in the line of succession.
The royals announced in 2010, that the Duke of Cambridge, had graduated from his Search and Rescue training course, and was a fully qualified, fully operational Search and Rescue pilot. He reportedly worked as an RAF search and rescue pilot and with the air ambulance for five years.
