I don't know if this is meant to be part of this hoarding or not but I sure liked the design. It's been done freehand using a paint roller or sponge pad and just looks like some crazy alphabet. Whatever, it's damn effective.  

Graffiti? by the Tate Modern

Stencil graffiti
London 1 2 3 4 5 6 7 8 9 10 11
Bristol 1 Brighton 1

Spray can graffiti
1 2 3 4 5 6 7

Stickers 1 2
Sculpture / Installs 1
Paste ups 1 2 3
Text graffiti 1 2
other graffiti images 1 2

Graffiti books 1
Graffiti DVD's 1

Featured artists
 adam neate /  arofish / banksy / dface / eine  / faile / obey / invader / shok-1 / tlp / toasters / Full list

Street Art / Graffiti Shows
listings / pictures