Where Does Your Tube Go At The End Of The Day? For A Special Tube Bath, Of Course

Ever wondered how the exteriors of London's tube trains stay so shiny and bright? You may have quaint visions of a hundred TfL workers with buckets and squeegees, but the truth is actually a lot more fun. We boarded a train as a special platform at Seven Sisters, to see exactly what bath time looks like for a London Underground train.