Petroc Trelawny presents a concert given at the Barbican in April 2008 as part of the London Symphony Orchestra's complete cycle of Mahler Symphonies. Elena Mosuc (soprano) Zlata Bulycheva (mezzo-soprano) London Symphony Chorus London Symphony Orchestra (guest leader Sebastian Breuninger) Valery Gergiev (conductor) Strauss: Metamorphosen Mahler: Symphony No 2.