The coffin will be moved from the gun carriage to the state hearse and driven to Windsor as the procession reaches Wellington Arch.
As the procession leaves, the parade will give a royal salute and the national anthem will be played. The King and members of the Royal Family will then leave for Windsor.
Thousands of people are expected to line the route out of central London along Great West Road,past Heathrow Airport, and through Staines before reaching Windsor.
