Leaked documents are revealing what will happen when Queen Elizabeth dies. Known as Operation London Bridge, the paperwork details the protocols for the day of her death and the 10 days that follow.
Within the first few hours after her passing — which will be referred to internally as "D-Day" — a "call cascade" will take place so that the Prime Minister, the cabinet secretary and other high-ranking officials are among the first to hear the sad news.
When it comes to the public announcement, the message will likely read, "We have just been informed of the death of Her Majesty The Queen."
Flags will then be lowered to half-mast.
Elizabeth's death will then be acknowledged online.
The royal family's website will change to a black backdrop featuring a statement about the tragedy, while the U.K. government's page will display a black banner at the top.
All non-urgent matters are prohibited from being published.
Next, the royals will reveal details on the funeral, which will likely take place 10 days after the matriarch's death. The Prime Minister will then make a statement, being the first government official to do so.
At around 6 p.m., the prime minister will introduce Prince Charles as the new King. The following day, the Accession Council will proclaim King Charles as the new sovereign at a meeting and then do so publicly.
Two days after Elizabeth's death (referred to as D-Day+2), her coffin will return to Buckingham Palace.
"If the queen dies at Sandringham, her residence in Norfolk, eastern England, her body will be carried by royal train to St. Pancras station in London, where her coffin will be met by the prime minister and cabinet ministers," POLITICO states.
"If she dies at Balmoral in Scotland, Operation UNICORN will be activated, meaning her body will be carried down to London by royal train if possible," the publication adds. "If not, Operation OVERSTUDY will be triggered, meaning the coffin will be transferred by plane. The PM and ministers will attend a reception to welcome the coffin."
On D-Day+3, King Charles "will receive the motion of condolence at Westminster Hall" and then head off on a tour of the U.K., and the following day, there will be a rehearsal for when the coffin is transferred from Buckingham Palace to the Palace of Westminster, which is known as Operation Lion.
On D-Day+5, the coffin will arrive at the Palace of Westminster, where it will stay for three days.
"Her coffin will lie on a raised box known as a catafalque in the middle of Westminster Hall, which will be open to the public for 23 hours per day," states POLITICO. "Tickets will be issued for VIPs so they can have a time slot."
The very next day, funeral rehearsals will take place.
Leading up to D-Day+10, the country will be busier than ever, as they expect unprecedented crowds. On the day of the funeral, known as a Day of National Mourning, there will a two-minute moment of silence.
Processions will take place in London and Windsor, with the ceremony occurring at Westminster Abbey. The queen will then be buried at the King George VI Memorial Chapel.
The Palace has yet to comment on the leaked documents.