How many flutes are there in Simon Holt's flute concerto Morpheus Wakes? Nominally one, here the amazing Emanuel Pahud, but more usefully two or more. Scored for alto as well as standard flute, Holt exploits the timbral possibilities of both while ensuring that the orchestra's own flautist (doubling bass flute) and alto flautist (doubling piccolo) continue the idea of ‘two-in-one’ so central to his other recent concerto Centauromachy for clarinet, flugelhorn and orchestra written in 2010 and given its London premiere at the 2011 Proms.