Sorry for delay with postings - I had started a twitter a while ago and then immediately faced that usual problem of it soaking all my thoughts quickly before they get a chance of turning into blog post. I'll improve, but still you can follow me if interested.
a) It snowed. Fortunately, it's still above zero.
b) I've discovered original Banksy's piece almost around the corner:
Apparently, it had been there from September. A good reason to be more curious about your borough.