I remember years ago pulling into Euston Station in London, the walls were full of it.., and then it was suddenly all gone. Painting there would have been super-illegal right next to a live very busy railway line.
I do wonder if I am correct in my assumption about this artist jealously. It looks that way to me.
It does look that way and I wouldn't be surprised if there weren't some bitter rivalries in the same town. Shame tho