The NYCoS (National Youth Choir of Scotland) National Girls Choir celebrates its 20th anniversary this year with co-founder Christopher Bell leading from the front. Only a Singing Bird features 19 songs, 13 of them by Michael Head, including the charming Snowbirds, together with colourful, nuanced pieces by Gary Carpenter, Ken Johnston and Stephen Deazley (the gleefully playful The Circus). The CD reveals a meticulously integrated choir of mature abilities characterised by tonal delicacy and textual expressiveness. It bodes well for the next 20 years.