Why, in the 1850s, was the excrement of thousands of people being deposited straight into the Thames? How lethal were Victorian London's cholera outbreaks? And why is Joseph Bazalgette one of the most heroic figures in London's history? Here, in conversation with Spencer Mizen, Rosemary Ashton answers the most pressing questions on an infamous pollution event caused by soaring temperatures and huge amounts of human waste.
The HistoryExtra podcast is produced by the team behind BBC History Magazine.
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