From Animal:

“In London today, the G20 is in full swing, or rather, riot police are swinging at protesters. Local street artist D*Face took the opportunity to showcase some new work, not on the street but on digital billboards around the city. Several variations of the G20 20 pound note are being displayed with the Queen in varying states of makeup and facelifts, something D*Face has become quite good at….”

More photo’s and info on the Animal blog here.