You know it's Summer when the Proms are on. Conductor Daniel Barenboim and the West-Eastern Divan Orchestra complete their cycle of Beethoven's symphonies at the Royal Albert Hall with a performance of the Symphony No 9 in D minor (Choral). They are joined by the National Youth Choir of Great Britain, as well as a quartet of soloists - soprano Anna Samuil, mezzo Waltraud Meier, tenor Michael Konig and bass Rene Pape.