Posters

Has anyone seen the posters on the tube recently, with hand drawn pictures of mainly influencial people with a link to 'Turn Up The Heat.org' underneath? One example is of David Cameron. The drawing is very bad and doesn't look much like him. At the top it reads:

David Cameron!!!

George is watching you at:

(picture)

Heat - Turn up the heat. org

I have tried to get onto this, and my search engine doesn't want to know, what are these posters about as I can't seem to find out - who is George??