Pictures of People Breaking Royal Protocol
14 Pictures That Prove Breaking Royal Protocol Happens More Than You Think
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For safety reasons, protocol dictates that heirs to the throne travel separately in case of an emergency. So, for instance, Prince Charles and Prince William wouldn't share a car or a plane. However, the Cambridges have broken that rule from time to time, travelling as a family on the same plane, even though it puts two direct heirs (Princes William and George) in the same vehicle.