Recently, musicians from a Dutch orchestra arrived in London to play a concert only to discover it had been cancelled for lack of ticket sales. This kind of thing is happening more frequently, writes Norman Lebrecht. “An awareness is dawning across the musical world that the age of orchestral touring is over, leaving gaping holes in the concert calendar and another economic nightmare. The Philharmonia Orchestra has just totted up a two-thirds drop in touring revenues over the past year. The Academy of St Martin-in-the-Fields which has, for four decades, spent more time abroad than within sight of Nelson’s Column, has ( players tell me) great white gaps in its diary.”