Gregg Wallace gets exclusive access to one of the largest fresh milk processing plants on earth to see how they get milk from cow to carton in less than 24 hours. Cherry Healey discovers how milk is used to make cheese and ice cream on an epic scale and reveals why most people in the world actually can't drink milk. Historian Ruth Goodman investigates our complicated history with the white stuff and discovers just how tough it would have been to work as a dairymaid.
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