New paint on old walls

A narrow alley leads from Great North Road in Grey Lynn village to an open area behind the Victorian (or perhaps Edwardian) shops (on the right) and the old Grey Lynn Post Office (now a trendy cafe). I believe that the neighbouring butcher shop has contracted street artists to paint the walls (and also the rear of the butcher shop). Today was obviously the time for a new mural, and I saw the artists in action as I stopped on the way home from work to collect the mail.