Prince George is about to turn 12 — and with that milestone comes a very specific, and rather sobering, change to his royal life.

As second in line to the throne, behind his father Prince William, George has so far enjoyed a relatively normal childhood, albeit under the gaze of the public. But on 22 July, when he celebrates his 12th birthday, a key royal protocol will quietly but firmly come into effect: he will no longer be allowed to fly on the same aircraft as his father.

The reason is as morbid as it is pragmatic — to protect the line of succession in the event of a tragic accident.

A protocol rooted in history

This rule isn’t new. In fact, it was once personally overseen by Queen Elizabeth II herself. Former royal pilot Graham Laurie explained in a podcast that while Prince William and Prince Harry were allowed to travel with their parents when they were young, that changed the moment William turned 12.

“After that, he had to have a separate aircraft,” Laurie recalled. “We could only fly all four together with written permission from Her Majesty.”

From now on, Prince George will need to travel separately from Prince William when flying on official royal business. He can, however, still fly with his mother, Princess Catherine, and his siblings, Princess Charlotte and Prince Louis — since neither of them is directly in the immediate line of succession.

It’s a reminder that even at 12, George’s path is already mapped out with expectations that would be unthinkable for most children his age.