The Kellogg's factory in Manchester opens its doors to reveal how some of the nation's favourite breakfast cereals are made. Larger than Buckingham Palace, and running 24 hours a day, five days a week, the factory produces one million packets of cereal a day. Cameras spend a day there and follow the process of making Corn Flakes, Crunchy Nut Cornflakes, Rice Crispies, and Coco Pops, with members of the workforce as guides.