you will see what she has said. Go to her blog anyway as l think her work is great.
What ever you want to call it Street Art/Graffiti it is all over the Uk but these images are from the area l live in London. It goes from really amazing stuff to the very simple, done by children on the pavement in chalk!
The first image is of "Under the Arches" on South Bank, white was painted many years ago. Over the MANY, MANY years it has been going, it has sort of become an "allowed" place to grafitti and skateboard. The second image is what the same area of wall, looks like now. The walls are constently re-painted and designed.