Sir Simon Rattle ends his final concert as LSO Music Director with Messiaen’s mind-blowing Turangalîla-Symphonie – an explosion of passionate emotion and ear-tingling sound. So what happier way for Sir Simon Rattle to bring down the curtain on his years as Music Director of the LSO? He’s joined by two of his oldest musical friends – pianist Peter Donohoe and Ondes-Martenot player Cynthia Millar …