Widower John Field worked at Midland Red Bus Company told his family before his death that he remembered being exposed to the deadly dust The daughter of a Birmingham man who died from a work-related disease has appealed for information about the former Birmingham bus company where her family fear he may have come into contact with asbestos. Widower John Field worked at Midland Red Bus Company, based in Bearwood , and told his family before his death that he remembered being exposed to the deadly dust.