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.

Brighton-based Josh says he eats because he is bored _ and also to drown out the sounds of arguing from his parents. Cameras focus on the 16-year-old who weighs more than 20 stone.