http://news.bbc.co.uk/2/hi/uk_news/england/bristol/somerset/6444501.stm
Graffiti removal contractors in Bristol have painted over an early Banksy work by mistake. It’s a shame, and a loss culturally and potentially financially for the city, but wall art is meant to be ephemeral. In a way it just adds to the legend of Banksy that his early works can be lost in this way.