Prince George has just seven days before he’ll be forced to be separated from Prince William and Princess Charlotte

In exactly one week, a long-standing royal practice will come into effect, which will see 11-year-old Prince George separated from his parents and younger siblings.

Apparently, the tradition will only be applied to the eldest of Prince William and Kate Middleton's children, as he is the heir presumptive after his father, who will one day take on the role of King.

More recently, the public has seen more and more of the youngster. He attended the Euros final with his dad last June, where he watched England tragically lose out on the trophy to Spain, months before attending his mother's annual carol concert.

Alongside his family, George also appeared on Buckingham Palace's balcony for the Trooping the Colour in May and joined William in meeting with a group of World War II veterans.

Just this week, he joined sister Charlotte, ten, and parents in the royal box at Wimbledon, where he witnessed Italy's Jannik Sinner steal victory from reigning champion Carlos Alcaraz of Spain in the Men's Singles Final.

Prince George has made more frequent public appearances in recent years (Jordan Pettitt - WPA Pool/Getty Images)

And whilst we hope neither current King, Charles III, nor William will pop their clogs anytime soon and still have long reigns ahead of them, royal officials can never be too certain when the young Prince George have to step up to the position.

After all, his great-grandmother Queen Elizabeth II ascended to the throne aged just 25 following the premature passing of her father George VI in 1952.

He, himself, was forced to become King suddenly, too, when his brother Edward VIII abdicated to marry American actress Wallis Simpson in 1936.

As such, several practices will soon come into play in the coming weeks - when George turns 12 on 22 July - which are aimed at helping him prepare for the role in case he's forced to take it on earlier than expected.

One of these traditions will prevent George from travelling from either his parents or his younger siblings, as two members in succession must be kept apart in case of worst case scenarios, like plane crashes.

George will likely have to fly solo in the coming years (Chris Jackson/Getty Images)

In these separated circumstances, at least one heir to the throne will be protected at all times to keep the monarchy stable.

Such was also the case for 43-year-old William who, when he turned 12, was no longer permitted from flying with his father, nor his younger brother, Prince Harry.

Speaking previously to OK! Magazine, King Charles's former pilot, Graham Laurie explained of the practice: "We flew all four: the Prince, the Princess, Prince William and Prince Harry, up until Prince William was 12 years old.

"After that, he had to have a separate aircraft and we could only fly all four together when they were young with the written permission of Her Majesty.

"When William became 12, he would fly normally in a 125 from Northolt and we would fly the 146 out with the other three on."

Prince William was prevented from flying with his father when he turned 12 (Tim Graham Photo Library via Getty Images)

Whilst the tradition is unwritten, such precautions are heavily advised, being that Prince Philip's sister Princess Cecilie died in a plane crash in 1937, five years before Queen Elizabeth II's uncle Prince George was killed in the same way.

Such was also the case for the late Queen's cousin, Prince William of Gloucester, in 1972.

Whilst this tradition is somewhat undocumented, apparently, it's up to the reigning monarch on whether it can be broken.

So, if William and George did want to continue flying together, they'd have to ask King Charles for permission.