Latvian-born Kaspars, 18, weighs in at just over 17 stone, and tries to reduce his intake of fast food and takeaways with the help of a specially tailored diet.

Dominique, a 17-year-old teenager who weights just over 18 stone, embarks on six weeks of dieting and exercising in an attempt to shed the pounds.

Lucy, 18, and her mum agree to a wholesale lifestyle change to help Lucy get her habit of comfort eating in control, having gained over three stone in two years.