The new Sainsburys advert with Jamie Oliver and feeding a family for a fiver. The "mum" goes to the cheese counter and asks for 40 grammes of cheese...that's about an ounce and a half in "old money". As in - not much. So why does the film accompanying it show a big slab being cut and a huge mound of cheese on top of the prepared meal for the family? I'll tell you why - Jamie Oliver is a wizard.