“As centrepiece, longtime musical comrades Emanuel Ax and Slatkin stylishly realised the Heaven-sent K503 through well-judged tempos, shapely and expressive phrasing, varieties of subtlety (Ax adding tasteful decoration in the Finale), with the SLS characterful in support, the composer’s intentions speaking directly through musicians whose rapport is self-evident. The first-movement cadenza was by Robert Casadesus (as advised by Mr Ax), and his encore was a Chopin Nocturne, the F-minor, Opus 55/1.”