Empty London Underground train

I used to wake up at 4am to go my first job and always took the first train at 5am. There were days that the train was almost empty and I would find myself sitting alone. At first it was a bit scary but interesting, because I'd never seen the underground being so empty.... everyone's used to see it very packed. So, I did this Illustration a few months back, based on a picture that I took in one of those days.