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19-year-old Stuart weighs in at 19 stone living on a diet of beer, fatty snacks and frozen food. He undertakes a complete lifestyle change as he tries to reduce his calorie count by half, with a personal trainer to help.

Sixteen-year-old Ellouise from Newbury enjoys the finer things in life, but the good life is affecting her health. Weighing in at just over 14 and a half stone she is determined, along with mum Sarah, to shed some pounds.

18-year-old William, who is autistic and has eaten the same lunch of burger and chips every day for two years, goes on a tailored diet to reduce his calorie intake by half as he and his family agree to a wholesale lifestyle change.

Sixteen-year-old Anna from Warrington weighs in at almost sixteen and half stone as her appetite has got out of control, while her mother Sarah is the perfect partner in crime.

Cleo is 16-years-old and weighs in at just over 23 stone thanks to a diet of unhealthy convenience food and fizzy drinks, but she and her family change their lifestyles to try to halt their weight gain.

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 loves food, but she does not know when to say no.

Lucy's habit of comfort eating is out of control.

TJ plays video games and snacks causing his weight to rocket.

Leanne's love of cooking has led to weight gain.

Sixteen-year-old Jake's fast-food habit is out of control.

Rosie's efforts to make some changes to her lifestyle.