Helen Marriage writes: "I am a producer of large-scale disruptive moments that place an artist's ideas in the heart of a city. I started life unsure of how to find a job and began helping a street theater company perform at the Edinburgh Festival. Only then did I realize that this could be a career. That was forty years ago. Since then, I've gone on to shut down central London and other cities with ephemeral events that transform people’s understanding of what a city is for and who controls it.

"I don't believe that cities are exclusively about shopping and traffic. Over the years I've developed a real sense of how artists can change the world, if only we make space for their vision. I guess that's my job -- to create a context in which the normal routines of daily life are disrupted for a moment to allow the public, especially those who know they’re not interested in anything the arts might have to say, to discover a new world we’d all like to live in."