Pure Evil galleries are currently hosting a Roa exhibition. He's the guy that's associated with large brush style animal pieces. I first spotted his work earlier in the year with a rabbit that made great used of a cantilever garage door to show two different views depending on how you look at it.
Along with the gallery he's also put a number of pieces up around the Hackney and Brick Lane area. I managed to find all but 2 of them, which couldn't be seen as they're on shop shutters and the shops were open for trade today. I'll need to go back to Brick Lane either first thing in the morning or at night.
My photos are here