We went to a performance of Winterreise at the Barbican, with Ian Bostridge singing and Thomas Adès accompanying.   It’s hard to imagine a more fiercely intelligent combination of singer and pianist or a more deeply thought and felt performance.   They came to the Barbican having performed it in Hamburg, Warsaw, Budapest and La Scala in white tie.   There must have been 3,000 people in the hall, so it was not exactly a chamber performance, but charged.   Afterwards, Bostridge talked about the book which he has just published on Winterreise and which he has performed so many times since turning to singing full time from eighteenth-century witchcraft.   A pity Adès wasn’t on the rostrum with him.