Exclusive access to some of the largest factories in Britain to reveal the secrets behind production on an epic scale.
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Gregg Wallace follows a load of corn as it becomes Crunchy Nut Cornflakes.
Follow potatoes from a farm in Hampshire through the world's largest crisp factory.
Gregg follows dried haricot beans through the largest baked bean factory in the world.
Gregg visits Britain's largest bicycle factory, which makes 150 folding bicycles each day.
Gregg Wallace follows a tanker of sugar through one of Britain's oldest sweet factories.
Gregg Wallace joins a human production line in the largest sports shoe factory in the UK.