We descended 60 metres below ground to see the vast new sewer system that will to transport Londoners' bowel movements for decades to come.
As a new Channel 4 show explores the mysteries of the fatberg, we went along to look at (and smell one) for ourselves.
The fatbergs will poison us eventually.
“This fatberg is up there with the biggest we’ve ever seen. It’s a total monster and taking a lot of manpower and machinery to remove as it’s set hard.”