14-year-old Libby weighs north of 22 stone, and believes her mum is embarrassed by her size, which pushes Libby toward comfort eating. Together with her family, Libby now wants to embark on a strict diet and exercise regime to turn her life around.

Sol began comfort eating after he came out as gay.

Cameras focus on 18-year-old Charlotte, who lives near Southampton and weighs 25st. She is desperate to shed her own weight, and also fears her dad's size could be life-threatening.