“Every time I think I’ve painted something slightly original, I find out that Blek le Rat has done it as well. Only twenty years earlier…” - Banksy
Blek Le Rat, “The Godfather” of Stencil Graffiti Celebrates 30 Years of Art In The Streets
Real Graffiti War Robbo & Banksy
The link above is an article from sabotage times, its an interesting read.