Generation XXL

At just 10 years old, Jake has to cope with being six feet tall and almost 18 stone. He lives in Southwark, London, one of the 10 worst boroughs in Britain for childhood obesity. Ten-year-old Lauren lives in Leeds and has become one of WeightWatchers' youngest ever members. And in Bradford, nine-year-old Sabrina's diet is a combination of rich home-cooked dishes and halal junk food, and her mother worries about the family's history of illnesses.

London-based seven-year-old Libby is a notoriously fussy eater: she won't eat anything but calorie-laden carbs and constantly battles with her single working mum over the issue of food. Seven-year-old Lucas scavenges food from his extended family, who all live on the same street in Bradford, and Kelsie, who's also seven, comes from a family of big girls. The youngest child in the series is six-year-old Bethany, whose mum believes that healthy eating in schools has gone too far.