The Local Health Board have contacted you to ask that you help with a specific challenging behaviour. They have a problem with patients smoking outside the main entrance. Across the day, in-patients are leaving their wards and making their way to the entrance in order to have a cigarette. The entrance to the building is littered with cigarette butts, there is a strong smell of smoke, and the patients themselves look far too ill to be smoking. Can you design an intervention to help the patients and the Health Board.