Is there any truth to the theory that Prince George Duke of Kent was involved in peace talks with Germany?

The Duke was killed in a plane crash on active service in World War II at Eagles Rock near Dunbeath, Caithness, Scotland on August 25, 1942. The Short Sunderland he was flying in was officially heading to Iceland where the Duke was to meet senior members of the US military. However the Duke's death at the height of World War II has led to various conspiracy theories surrounding the plane crash. Some theories state that the Duke was actually heading to Sweden for secret peace talks with the Germans. Related to this are claims that the Duke was travelling with Rudolf Hess, the deputy to Adolf Hitler; a reported additional, unexplained body at the scene of the crash has been attributed as Hess', with the man later tried at Nuremberg allegedly an impostor.Other claims state the Duke was at the controls of the plane, and his inexperience may have caused the plane to crash.