On the Buses 1969 S01E04

Episode: Bus Drivers' Stomach. Stan is not feeling well as he is suffering from stomach aches. Arthur reckons it's because he eats too many chips and other fried foods and suggests he go on a diet. At the same time the depot are giving the staff medicals and those deemed unfit will be put on menial duties. Stan goes on the diet and passes the medical though finds it might have been better if he had failed it.