Hugh Fearnley-Whittingstall is back with the last instalment of his series on a national health crisis that he's determined to do something about. In this final showdown, he examines some of the misleading marketing claims on 'healthier' products, unveils the truth about why Brits love to snack and challenges a family to rethink their portion sizes. And, after almost 100,000 people sign Hugh's letter to the health secretary, he finally gets the interview he has been after for months, discovering some exciting changes that are on the horizon.

British people snack more than any other European country and since the last series aired, lots of people have told Hugh about the foods they find irresistible. To find out more, he runs an experiment to uncover which snacks have Britons hooked and discovers a surprising new theory about one particular combination of ingredients people cannot help but find irresistible.

One of the main drivers of obesity is the simple fact that people are all eating too much. Hugh visits a Torquay family where the father wants help with his diet to stay healthy for his daughters and shift some pounds. Hugh challenges the family to transform their eating habits with a few simple and memorable tricks to reduce the portions on their plates.

Hugh heads to Westminster with Jamie Oliver to talk to MPs about the obesity crisis. He gets the chance to put his questions directly to the health minister and sees many of the issues he has raised throughout the series addressed in some exciting announcements - but are they going to be enough?

In a final fight back against fat, Hugh sees the 'veg power' advertising campaign go to a whole new level, in the hope it will change kids' attitudes to vegetables once and for all. Show less