English artist Nick Walker is a prime example of street art's recent acceptance by the world of fine art. With pieces by Walker and others now just as likely to be seen on gallery walls as roadside ones (Walker's stencil paintings are even being sold by Bonhams at a forthcoming auction), Wooster Collective brings us a video showing the artist getting back to his roots on London's Old Street. You can watch the full video of Walker at work and the reactions of passers by here.