Operation London Bridge: The plan to deal with the death of the head of state in Britain was termed Operation London Bridge (also known by its code phrase London Bridge is Down).

Key Facts:

• These protocols are actually a detailed script for key logistical matters and procedures, including the funeral procession.
• Her death kicked off a detailed plan, put in place in the 1960s, to play out in the eventuality of the monarch’s death.
• It ranges from succession rules to the process of bringing the queen's coffin from Balmoral Castle in Scotland to London.
• As well as Operation London Bridge, there is an additional plan called Operation Unicorn, which details what would happen if the Queen were to die in Scotland.
• Running concurrently with Operation London Bridge is Operation Spring Tide, which addresses the accession of King Charles III to the throne and his first trip to the countries of the UK.
• The plan designates her funeral day as D+10 and the day following her death as D+1 (D-day plus 10 days).
• After relaying a condolence message, the British parliament will suspend business for these 10 days during this period.

• Queen Elizabeth II's family, supporters, and admirers are in mourning.
• Since the passing of Elizabeth's father, King George VI, in 1952, a governmental apparatus in Britain that had lain dormant for 70 years has been activated as a result of her death at age 96.
• The information about the Queen’s death is conveyed to the British Prime Minister.
• Her passing away as conveyed to has already been conveyed to other governments where she was the head of state, and then to 38 other nations of the Commonwealth.
• Also, Queen’s death means that Prince Charles immediately becomes King and head of state for 14 Commonwealth realms.
• However, an official proclaiming will only be made a day after the Queen’s death.
• This, according to the BBC, will happen at St James’s Palace in London, in front of a ceremonial body known as the Accession Council.