The Behn Quartet know no fear. The quartet of young women take their name from a trailblazing 17th century female playwright and have been winning international competitions and rave reviews since they formed three years ago. In the middle of their CMNZ tour, New Zealand violinist Kate Oswin and cellist Ghislaine McMullin talk about their feisty approach.  Here they are playing a string quartet version of Bohemian Rhapsody by Queen, for a BBC documentary.