Security is always a top consideration when it comes to the Royal Family and travel.

One famous rule dictates that royal heirs must fly separately, meaning Prince William and King Charles will never usually be on the same plane. And once he turns 12, the rule will also apply to little Prince George.

And the health of the royal relatives is also a big priority. Indeed, shellfish is banned on royal tours to avoid the schedule being thrown into chaos by a bout of food poisoning. And to protect the monarch from being poisoned, at large banquets, an assistant chooses one plate at random.

Royal commentator Emily Andrews explained: “After everything is plated up, a page chooses at random one of the plates to be served to Her Majesty. So if anyone did want to poison the monarch they’d have to poison the whole lot!”

Perhaps the most strange rule the royals have to follow relates to what they pack. According to one royal correspondent, and former press secretary to the late Queen herself, many senior members of the royal family, including the Queen and Prince Philip at the time, travel with a vial of their blood in tow. The rule most likely extends to King Charles and Prince William, who would inherit the throne in case of any disasters.

The reason behind this rather strange tradition is related to unforeseen serious medical emergencies, reports Women and Home. The blood would be there in case the royal member needed a blood transfusion, and there wouldn’t need to be any delay in finding the right blood group.

During a podcast episode with Hello magazine, the expert explained that this rule is in place in case there is a medical emergency. Dickie says, “You’ve got to make sure that you’re covered in every eventuality.” He then explained that the blood is there “for the case there was a blood transfusion [needed]. There’s never really a guarantee that you’re going to get the right type of blood at your destination. So you carry it,” he said.

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