Found It!

When a mural by the British street artist Banksy disappeared from a wall in North London recently, nobody expected that the pinched painting would end up back in the public eye. If someone wanted to sell a pilfered artwork by a well-known artist, best to do it quietly.
Source: The Guardian

So I don't thing this is the original back in London but it's certainly very topical right now, you can view it London's Covent Garden!