12 hours, two cans of Red Bull, no sleep (aside from one power nap) and two bathroom breaks later and 3OW is walking out onto Leicester Square at 8am on a cold February Sunday morning. So what gives? What would drive a person to push the limits of human endurance?

With the amount of documentaries being made each year now - thankfully - numbering in the eighties, 'Let the Fire Burn' has plenty of competition vying for documentary fans’ attention at the local multiplex.