With Katie Derham Valery Gergiev makes the first of his two appearances at the BBC Proms this season with two symphonies by Mahler, celebrating the 150th anniversary of his birth this year. Gergiev conducts the World Orchestra for Peace, an ensemble of leading players from around the world. The often child-like innocence of Mahler's Fourth Symphony is followed by the funereal, stormy and ultimately life-affirming Fifth. Introduced by Andrew McGregor. Mahler: Symphony No.4 in G major Mahler: Symphony No.5 in C sharp minor Camilla Tilling, soprano World Orchestra for Peace Valery Gergiev, conductor Followed by a performance from last year's East Neuk Festival: Haydn: String Quartet in B flat major, Op.50 No.1 Doric String Quartet.