Princes William and Harry will stand guard over the Queen's coffin in a vigil on Saturday while world leaders start arriving in the UK ahead of the funeral.
Mourners will continue to pay their respects during the day at Westminster Hall where the Queen lies in state with the queue getting close to 24 hours long from the start at Southwark Park.
Representatives from Commonwealth realms will also be invited to visit the coffin and world leaders arriving throughout the weekend will be able to sign a book of condolence at Lancaster House.