sentences:  Lewin joined up with Vivien Ellis, another member of the Dufay Collective and the Carnival Band to become the duo Alva in 1997, specialising in the music of the troubadours.The songs on "The Bells of Paradise" were first performed at the 2003 York Early Music Festival.Alva also performed at St John's, Smith Square in 2001 as part of a live performance for BBC's "Late Junction".