The Queen's grandchildren will stand vigil beside her coffin in Westminster Hall on Saturday evening.
They will stand around their grandmother for 15 minutes as a mark of respect, Kensington Palace has said.
The Prince of Wales will stand at the head and the Duke of Sussex at the foot. They will both be in uniform at the King's request.
Harry has been denied the chance to wear his military uniform as he publicly mourns because he is no longer a working royal - despite seeing action on the front line during two tours of duty in Afghanistan....