Well spotted. As I said before, nearly all the pictures I have seen of people said to be freezing are a joke, not least due to the wholly inadequate clothing they are wearing and the inclusion of a stupid blanket. But the text in that article is similar to that in Government publications, based in turn on academic studies. Who am I to say the studies are misguided? But it leads to almost all guidelines saying you must heat your house to at least 18C. I say it's nonsense and think I am living proof.