Her voice may be soft and light, but there is nothing limp or vague about Emilia Martensson's singing. In her gentle way, she is among the most incisive of today's crop of impressive young vocalists. She also has a dauntingly wide and adventurous repertoire, taking in Jacques Brel, Nat King Cole and folk songs from her native Sweden – and that's where Barry Green comes in. A pianist of immense delicacy, he also swings with real style. This could grow into a classic partnership. Listen out, too, for some terrific bass clarinet from guest soloist Julian Siegel.