Si King and Dave Myers embark on a quest to lose weight while still enjoying the food they love by creating healthier versions of their favourite recipes, and ask fellow dieters to test the new, low-calorie dishes. The duo also search for ways to make their lifestyles more active - including swapping their motorbikes for pedal-powered machines - and learn why obesity is an increasingly serious problem in 21st-century Britain
Si King and Dave Myers continue their dietary challenge by reinventing favourite family meals. They come up with a cooked breakfast that delivers all the excitement of a fry-up without adding to the waistline, and a calorie-conscious roast chicken dinner. They also rework French classic the cassoulet and set it before a couple of famished rugby teams, and make the ultimate sacrifice in a bid to help shift the pounds - give up their beloved motorbikes in favour of bicycles
Si King and Dave Myers come up with a fat-friendly pie for fellow dieter Ann, baking a pastry treat that comes in below the 700 calories of a standard pork pie - but keen to lose as much weight as they can, they don't taste it themselves. Moving on to Dave's home town of Barrow-in-Furness in Cumbria, the duo try to persuade the diners in Chinese and Indian restaurants that their favourite dishes can be even better with all the fattening elements removed.
Si King and Dave Myers create low-calorie versions of their favourite party treats, including fairy cakes, quiche and chilli tacos, and Olly Smith offers advice on wines suitable for slimmers. The duo then reflect on how trying to lose weight has improved their lives and learn whether the Big Dieters have also managed to change their eating habits - before paying a final visit to diabetes expert Roy Taylor and dietician Ashley Adamson to discover if their new diets have yielded the desired results. Last in the series.
