Grim footage shows JUST how filthy Tubes are with bucket of black sludge from just 4 seats – as dirtiest lines revealed

GRIM footage has revealed how filthy the tubes are – with grime from just four seats filling a large bucket with black sludge.

Steven James has gone viral over a clip of him and his team steam-cleaning seats on a moving Northern Line tube.

SWNSJust four seats filled up this bucked with black sludge[/caption] SWNSThe crew cleaned the seats on the Northern Line[/caption] SWNSTheir video racked up millions of views on social media[/caption] SWNSSteven James and his crew[/caption]...