Olympics 2012 in art: Wolfgang Tillmans's twist on the Olympic rings

Olympics 2012 in art: Wolfgang Tillmans's twist on the Olympic rings. For the last in our series of exclusive artworks responding to the Games, photographer Wolfgang Tillmans, who started out shooting London street life, steps into the ring to celebrate the end of the Games – by capturing one of the disliked dedicated traffic lanes on the way to the Olympic park