S1, E3: Long and lanky, 22-year-old Alex Law from Stockport hits the scales at just ten stone because he barely eats a meal. Tired and exhausted, he lives on a diet of caffeine pills supplemented by stodgy cakes and snacks despite holding down the physically demanding job of a plasterer. His diet swap partner Tracy Morgan from Wales has a mouth that's constantly on the move. Her weight has soared to nearly 20 stone.