Music Matters - Nigel Kennedy, Alzheimer's, John Cage

Tom Service talks to violinist Nigel Kennedy about his passion for Poland, jazz and football ahead of the 'Nigel Kennedy Polish Weekend' at London's Southbank Centre. He also talks to the team of musicians and scientists who are exploring the subject of Alzheimer's disease in a new opera and looks at the music and philosophy of American maverick John Cage through the prism of his seminal piano piece 4'33". Produced by Brian Jackson.