Images of the Duke and Duchess of Cambridge travelling around with their adorable children have spread far and wide recently and one thing everyone has been noticing is how picture-perfect William and Kate look in their matching outfits.
There is one piece of trivia about the royal family's travels that not many people are familiar with, though, and it'll make you grateful you're not one of them.
Every time a member of the royal family travels abroad, they are obliged to take a black outfit to wear in case one of their relatives dies.
This is actual part of the policy and it is compulsory.
Back in 1952, while visiting Kenya with Prince Philip, the Queen received news of her father's death.