I'm looking after someone who has started wandering outside the house at night. This person lives alone. At present they do not accept there is a problem and has no 'care package'. The family are too far away to respond in time to a perimeter alarm. We're trying to introduce apporpriate care, but until the person agrees, has anyone found a safe way of detering people from wandering outside - without locking them in (which would obviously be unsafe if there was a fire?)