Queen Elizabeth II has reached another milestone in her life when she turned 90 years old. The longest-reigning monarch's remaining few years and the events leading to her death were already planned out. These things are known to Her Majesty. The royal expert Victoria Arbiter said before that the royal family does not want to leave any stone unturned when it comes to the Queen's funeral.

 According to The Guardian, the day of her death and the nine days that follow were already planned out many years ago. According to writer Sam Knight, the plans are known as the "Operation London Bridge." It does not only encompass the days before the actual death but the days following so that nothing is missed in giving the Queen the highest honor.

Professor Huw Thomas, Queen Elizabeth II's head doctor, will closely observe her health giving out updates on her declining health from time to time.

Once she dies, Prince Charles will then be considered as the new King and a series of events will take place in the Palace. The Queen's secretary, Christopher Geidt will contact Prime Minister Theresa May. Then all heads of the governments and nations will be informed.

Then her body will be transported to the Buckingham Palace throne room. Then a 10-day sequence will commence which will be overseen by Earl Marshal, Edward Fitzalan-Howard, the 18th Duke of Norfolk.

Then all kinds of flags, including beach flags will be at half-mast. All events will be canceled and all European royal families will go to the palace. The coffin containing the crown jewels will be sealed with a temporary lid.

The following day, the flags will be raised again. Prince Charles will then take his oath as the new king. Afterward, the new king will have a tour all over the country. After the end of the third day, the coffin will be moved to Westminster Hall and will be kept there for four days.

After being sworn in as king, Prince Charles will then begin a country-wide tour. Three days later, the coffin will be moved to Westminster Hall during a procession and kept there for four more days. On the final day, the crown jewels will be taken out from the coffin and cleaned before dawn.

At exactly 11 a.m., the coffin will be carried to the Westminster Abbey doors with the archbishop saying the last prayers. Then the coffin will be carried by sailors to St. George Chapel placed in a carriage previously used by monarchs. The body of the queen will be interred in the royal vault inside the castle.

According to E! News, when the palace press informs the public that the "London Bridge is Down," that is the time they pay their final homage to the Queen who has successfully served her constituents for 65 years. This early, the Queen is already preparing for her retirement by delegating her duties to the younger royal family members.

At the age of 90, Queen Elizabeth II has lived a full and meaningful life. Her leadership will then be passed on to Prince Charles. After him, Prince William will then be declared as the new king.