Rafe Heydel-Mankoo, a royal historian, says the arrest of the former prince is a historic moment.

“This is completely unprecedented in modern history. In fact, the last time a senior royal or any royal was taken into custody was in 1647, when King Charles I lost the English Civil War and was seized by Parliament … that’s how historic it is,” he told CBC News Network.

King Charles I was tried for treason in 1649 toward the ​end of the English Civil War, found guilty and beheaded.

Andrew’s elder sister Princess Anne was fined for speeding in 2001, and the following ⁠year became the first royal to be convicted of a criminal offence in 350 years when she appeared in court to plead guilty to failing to stop one of her dogs, Dotty, from biting ⁠two children.

“They were never arrested, they were taken into police custody. This is an absolutely remarkable moment in constitutional and British royal history.”