Violinist-conductor Maxim Vengerov's world tour with his UBS Verbier Festival Chamber Orchestra has not quite worked out as planned. A "small accident", as Vengerov put it, to his bowing arm meant he only managed one of the three scheduled concertante Mozart works. Nevertheless, with the evidence of his influence on the Verbier players - an international ensemble boasting the cream of young talent - no one could feel short-changed here. The group may be clumsily named, but the their sound was immaculate.

The opening Violin Concerto No 2 in D, K211, seemed neither to tax Vengerov nor move him to great expressive heights: his tone was pure and as super-sweet as ever, but slightly insubstantial - perhaps due to the bowing problem. In the Sinfonia Concertante in E flat for Violin and Violas, K364, Vengerov ceded his solo role to Mayumi Seiler, and while her playing could not be faulted, it paled in comparison with that of violist Laurence Power. Power brought not only authority to the interpretation but warmth and spontaneity. Together, though, he and Seiler made the exquisite poignancy of the central C minor Andante cantabile speak volumes. Vengerov dedicated the evening's closing performance of Shostakovich's Chamber Symphony, Op 110a, to the memory of Mstislav Rostropovich. Its savage beauty proved a perfect foil for Mozart.