Dulag Luft were German Prisoner of War (POW) transit camps for captured airmen from any of the allied air forces during World War II. Their main purpose was to act as collection and interrogation centres for newly captured aircrew, before they were transferred in batches to the permanent camps.
Harry Melville Arbuthnot Day, was a Royal Marine and later a Royal Air Force pilot during the Second World War. As a prisoner of war, he was senior British officer in a number of camps and a noted escapee.