A UK man, Chadwick Jackson, uses a face wipe to demonstrate just how dirty the London tube really is amid the coronavirus pandemic.
Chadwick holds a face wipe onto the handrail of an escalator for 40 seconds before revealing the black residue.
The video was posted to Twitter (@CJXCII) with the caption: "TFL has a lot to answer for."
He told Newsflare: "I have asthma and can not afford to get ill, so Coronavirus has me very concerned.
"With that being said I do not think enough is being done to prevent the spread in a city like London."
The experiment was recorded in Waterloo Station on Wednesday (March 11).