The London Symphony Orchestra is 90 years old. To mark the occasion, eminent musicians Michael Tilson Thomas , Colin Davis and Mstislav Rostropovich conducted the LSO during the course of this gala event given last week at the Barbican in London. The concert, which also featured young violinist Sarah Chang , is broadcast in full with interviews and archive footage of London's oldest orchestra. Simultaneous broadcast with Radio 3. For full details of the music see page 124. Director Kriss Rusmanis ; Producer Jonathan Fulford