This continuing series is turning into a real classic: Jean-Efflam Bavouzet has an infectious sense of the witty fun that underlies so many of Haydn's inventions, and the finale of the D major Sonata No 30 fairly fizzes with joy. But the real discovery here is a new version of the wonderful, touching Variations in F minor. Bavouzet has transcribed a version of the piece's great climax which Haydn deleted in his manuscript; but with cunning programming you can hear both this and the later, greater version. Like Bach's first, short cadenza to the fifth Brandenburg, Haydn's first thought is well worth hearing.