Michael Berkeley's guest is biogeographer Professor Philip Stott, who taught for many years at the School of Oriental and African Studies at the University of London, and is well-known to Radio 4 listeners as a panellist on the environmental programme Home Planet. A passionate music lover, he has published several books of recorder music, but his choices focus on chamber and orchestral works by Haydn, Mozart, Beethoven, Fanny Mendelssohn and Saint-Saens.