The royal siblings will see their lives change dramatically in less than 12 months time due to a very old royal rule designed to keep the heir to the throne safe

An odd but logical Royal rule could see Prince George and his sister Princess Charlotte be separated once he turns 12.

The rule in itself isn’t new and will mean that Prince George will no longer be able to travel with his father or sister, it was something Prince William also had to endure when he turned 12 too. The rule is designed to protect the monarchy in cases of accidents and keep the line of succession safe.

Prince William is next in line to the throne should anything happen to King Charles. George is third in line and Charlotte is fourth, in the event of an accident on an aircraft or another form of transportation, it could threaten the immediate line of succession were they all to travel together – this is why the rule forbids them all from travelling together.

News of the unusual rule was revealed ahead of Prince George’s 11th birthday on 22 July by King Charles’s former pilot, Graham Laurie. He told OK! magazine: “We flew all four: the Prince, the Princess, Prince William and Prince Harry, up until Prince William was 12 years old.