Great British Landmark Fixers S01E06 - London Sewers/Tideway

How Joseph Bazalgette's incredible Victorian London sewer system in is getting a 21st century upgrade. Huge machines bore a network of tunnels linking Bazalgette's old sewer network to the Tideway Super-Sewer - a series of gigantic tunnels running for 25 kilometres alongside the River Thames. But while the work progresses, the sewage keeps on coming.