The sad passing of Queen Elizabeth II on Thursday afternoon saw a number of senior members of the Royal Family rush to Balmoral Castle at short notice to be with the monarch in her final moments.
It was a touching gesture of the deep love they held for a lady who was their mother, grandmother, and guiding light through all of The Firm's many ups-and-downs over the last 70 years.
But being an event of such national importance, a set of arrangements for what happens after she dies has existed for some time, with a strict schedule already prepared by officials at the Palace and in government.