Tim Garland - the former sax protege, folk-jazz explorer and current Chick Corea sideman - has acquired such a high profile that his latest residency in the West End is a week-long affair. He got the ball rolling this week with two nights for his powerful Underground Orchestra, an ensemble that was born in the Dean Street Pizza Express.

The band mingles Garland originals, unusual imports (such as Kenny Wheeler's 1960s Windmill Tilter suite) and deftly reworked jazz standards. This week's A-list lineup included the graceful Henry Lowther on trumpet and a thrilling Gwilym Simcock on piano.

Lowther delivered a pensively gliding mid-tempo episode from Windmill Tilter with something of Wheeler's long-tone purity, but with the pin-sharp clarity that is his own trademark. Garland's fine composition Made By Walking, which juxtaposes honking low-horn sounds with plush reeds figures, brought out the composer's own raw-boned tenor-sax swagger. Monk's Round Midnight was given a bleary, TV-thriller urgency, and Lullaby on Dean Street was breakneck postbop, like steering a skidding car through an obstacle course.

· Until Sunday. Box office: 020-7439 8722