Those of you who who have read this blog before will probably recognise this piece instantly as the work of Osch. This is one of a series of works characterised by a frame of an orange/yellow circle with some kind of scene, usually silhouetted going on inside the circle.
In this case it looks like the character is Guido Fawkes, although exactly what story the piece is telling I am not so sure. The other trademark style used by Osch is using painted ribbons to create the illusion of solid forms as can be seen from the face of Guido. He uses this technique to great effect in his rhinoceros piece nearby.
Another compelling piece by this adopted son of London.