Sorry to come in on here : but............ you can actually live on porridge, the fat that it is just made with boiling water doesn't come into it.  The man also has pot noodles which will give him a little veg, meat etc and starch for warmth and energy, having said that he would probably benefit from a bit of fruit and veg too.  Fact : we tend to over eat, I think you will find that he is probably healthier on his diet than any of us.