Robbo and London graffiti
The only reason I know about "King Robbo" is because there was a documentary, "Banksy vs Robbo & The Graffiti War" which ran at least once on the Ovation (arts) channel.
And I learned that Banksy's rat is somewhat derivative from a graffiti artist in Paris. I came across a Robbo graffitum somewhere (don't remember now) and shot a photo of it.
It's a good documentary.