Queen Elizabeth’s funeral, expected 11 days from now, will be the culmination of an official mourning period that began with her death Thursday at Balmoral, writes cbc.ca.

But planning to honour the 96-year-old’s life began decades ago, in the strictest of secrecy, under its own code name - London Bridge.

As little as possible will be left to chance over the next week and a half, leading up to a funeral at Westminster Abbey in London, followed by the committal and burial at St. George’s Chapel in Windsor Castle, west of London.

As much as the next several days are about remembering the Queen, they are also about the beginning of the next reign, as Prince Charles became King Charles III immediately upon his mother"s death and assumes the role he has been preparing for throughout his life.

In the royal plan, the days of mourning are identified as D (day of death) plus a number. However, D has been designated as Friday instead.