It was quickly done to change the British national anthem from “God Save The Queen” to “God Save The King”.

But changing the image on bills and coins is not done in the blink of an eye. According to British newspapers Online Mail it may be several years before all banknotes and coins bearing the image of Queen Elizabeth go out of circulation and are replaced with images of King Charles.

Another change is that King Charles’s gaze will be turned to the left, while the Queen’s will be to the right, as required by the strict British tradition associated with monarchy since the 17th century.

Because Elizabeth was Queen of the nation for over 70 years, most Brits have never encountered anything other than pound notes, coins and postage stamps with the Queen’s face on them.

The change of throne also meant that the British passport had to be changed, and not least the name of the office that issued it: His Royal Highness’s Passport Office became His Royal Highness’s Passport Office.

There will also be a change of titles in the British judiciary, as well as insignia on police uniforms and helmets.

However, postboxes with the Queen’s initials – ER for Elizabeth Regina – will remain, while the new one will be equipped with King Charles’s initials.

This was also the case when King George died in 1952. Some post boxes still bear his initials even though it has been more than 70 years since Elizabeth became Queen.

based on Security the thousands of flags that have flown outside the state police station and on naval vessels have also had to be replaced because of the initials EIIR (Elizabeth II Regina).