'Op Unicorn', 'London Bridge' explained: Codenames for Queen's funeral
It is no secret that the UK's plan for the eventual death of Queen Elizabeth II was codenamed London Bridge.
But there were special provisions if the monarch died when she was in Scotland, called Operation Unicorn.
The unicorn is the national animal of Scotland and forms part of the royal coat of arms, along with the lion of England.
The 96-year-old monarch passed away at her remote Highlands residence, Balmoral, with all her immediate family flying in to be at her side.
Aspects of Operation London Bridge were already activated such as BBC presenters wearing black and channels switching to rolling news.