Is this mooning Mona a Banksy? I know not. It’s low down and small (seven bricks tall and near ground level) but none the less effective for that:
Merely yards away we have another variant on the let’s-manipulate-Mona theme, larger and more elevated. Plastic-coated ascii Mona looking down askance from a window on a disused building.
It’s enough to make La Gioconda weep.
frizzyLogic 
What fine finds!
It’s like shooting fish in a barrel round Hoxton way. I’ve got about 50 such pictures.
the top image is by Nick Walker
Thanks very much, mona collector.