Plot: One of the towering forces in British music today, Oliver Knussen, conducts the BBC Symphony Orchestra in a colourful programme that includes Stravinsky's musical poker-game Jeu de Cartes, Respighi's Fountains of Rome, the Proms premiere of Virga by the young Scot Helen Grime, Balakirev's oriental fantasy Islamey and Knussen's own Horn Concerto, performed by Martin Owen. Presented by Suzy Klein