Street art - Edinburgh

There is very little street art in Edinburgh which is a shame.  We have had a new addition to the urban landscape however.  Work In Progress Edinburgh have recently brightened up the otherwise dull East Market Street.  The group describe themselves as "a new organisation representing a group of independent artists, creative practitioners, urbanists, activists and others who like to collaborate across all cultures and disciplines".  I hope this work is an impetus for the growth of artistic pieces across the city.