Various shots of mail bags on GPO underground railway in London.
GPO (General Post Office) underground railway at Mount Pleasant, London,
L/S of Mount Pleasant, GPO HQ. Various shots of underground GPO railway: mail bags are unloaded from conveyor belt and loaded onto unmanned trains. Good view train coming into station. C/U man at control board and shots of wall map of train lines. Good shot men loading train, train moves off out of station.