In the seventh episode of "Barbara London Calling," Barbara speaks with Iain Forsyth and Jane Pollard, two London-based artists and collaborators with a background in installation art and the moving image. Music has always played an important role in their work, culminating in their 2014 feature film, "20,000 Days on Earth," a musical docudrama starring the iconic singer/songwriter Nick Cave. Iain and Jane began their fruitful collaboration as students at Goldsmiths in London, where they saw firsthand the good and the bad of the so-called YBA movement of young British artists.