Bert Jansch, 1943 - 2011, was one of the most influential guitarists of his time.

Already a legend in folk music circles by the age of 19, he was an intensely private man and notoriously difficult to interview.

In a book that describes their time together, Heather Jansch, Bert's former wife, has written an affectionate memoir that reveals something of the man behind the music.

In this short film Heather talks to Bruce May, Bert's manager, about how the book came about.

The music in this film is Bert's song "Chambertin" recorded live in City Hall, Glasgow, in 1974. It is notoriously difficult to play, even for Bert (who was widely acknowledged as one of the world's great guitarists), and this is one of the very few complete recordings in existence.