Police have released CCTV photos of a man who has been missing from Chesterfield since Thursday.
60-year-old Roy Thompson left Chesterfield and North Derbyshire Royal Hospital at around 9.20am that day.
He is white, 6ft tall and of average build. He has short grey hair and was last seen wearing grey tracksuit bottoms and a green polo shirt.
He speaks with a slight South African accent and has links to Manchester.
Anyone with information should call police on 101.