Princess Anne will escort the Queen's coffin as the late monarch is flown back to London and returns to Buckingham Palace for the last time.
Members of the public are already queueing for the Queen's lying in state at Westminster Hall, which opens on Wednesday, and thousands are still placing floral tributes in Green Park.
At 6pm, the Queen will depart Scotland for the last time. Her coffin will be flown from Edinburgh Airport to London on an RAF Globemaster C-17 flight, accompanied by her daughter the Princess Royal.
