Of the Brodsky Quartet's collaborations in recent years, that with singer Jacqui Dankworth is arguably its most successful. Not only do her honeyed tones - by turns clear and mellow - sit well with strings, but she has the versatility to deliver songs by the whole range of artists who have worked with the Brodskys, and yet put her own stamp on them. Elvis Costello, Björk and Harvey Brough songs were given the Dankworth treatment, with just enough earthiness to provide an edge to the proceedings. Perhaps not surprisingly, though, it was in Kurt Weill's Speak Low, arranged by her father John, and Narciso, brother Alec's setting of a Lorca poem, that the colour and warmth of her voice was heard to its best advantage.

The Brodskys themselves were responsible for some numbers, including Paul Cassidy's re-instrumentation of Benjamin Britten's arrangement of Down by the Salley Gardens. The nostalgia Dankworth brought to this was carefully judged; more poignant were the solos Cassidy gave himself, no ego here but a tribute to Britten, whose viola Cassidy now plays. The arrangement of the Sinatra song Close to You by the Brodsky's first violinist, Andrew Haveron, exploited the tensions between voice and instrument much more flamboyantly. It was played with particular feeling by Thomas Bowes, who was standing in for Haveron in this performance.

In the purely quartet repertoire of the first half, the diaphanous textures of George Gershwin's Lullaby worked magic in the St George's acoustic, while the quartet Op 33 No 4 was a reminder of Haydn's defining genius in the medium. In terms of boundary pushing, it was an encore at the end of the evening that stood out, with the two Jacquelines - Dankworth and Thomas - duetting in Jimmy Van Heusen and Johnny Burke's Like Someone in Love. The intertwining of voice and cello was eloquent and graceful.