Almost one million British school children are obese and every one of them is different. Over the coming years, Channel 4's new landmark documentary series will follow the lives of a group of seven overweight children on their journey towards adulthood to find out what it really feels like to be growing up fat. This is not a quick-fix diet programme. Generation XXL is a chance for the nation's obese children to tell us what life looks like through their eyes and what the future holds, in a series that is not only about losing weight, but also about living with it.