Inside the Factory Series 3: Part 3: Biscuits Technology Documentary hosted by Gregg Wallace and Ruth Goodman and Cherry Healey, published by BBC in 2017 English narration Information Inside the Factory Series 3: Part 3: Biscuits Gregg Wallace is in London at Europe s largest biscuit factory, where they produce 80 million biscuits every day. He follows the production of chocolate digestives, from the arrival of 28 tonnes of flour right through to dispatch. Meanwhile, Cherry Healey is on the trail of that chocolate. Plus, Ruth Goodman examines the link between biscuits and digestion.