A native of Bedford, England, Vann pursued music as a chorister at King's College, Cambridge, and as a scholar at the Bedford School. He received a choral scholarship to attend Gonville and Caius College, Cambridge, and he studied piano with Peter Uppard. Later, at the Royal Academy of Music, he studied accompaniment with Malcolm Martineau and Colin Stone, and won the Sir Henry Richardson Scholarship and the Hodgson Fellowship in piano accompaniment. Vann also won many awards in competitions, including a prize at the Wigmore Hall -- Independent Opera International Song Competition, the Gerald Moore Award, the Royal Overseas League Accompanists’ Award, and several others.
Vann has accompanied many singers and instrumentalists at major venues in the U.K. and Europe, and he has commissioned and given first performances of new works by several British composers, including Christian Alexander, David Nield, Joseph Atkins, Ian Venables, Martin Eastwood, and Graham Ross. An Associate of the Royal Academy of Music, Vann is also a Fellow of the Royal College of Organists, the artistic director of the Bedford Music Club, and the director of music at the Royal Hospital, Chelsea, where he directs the Royal Hospital Chapel Choir.
Vann has recorded for Champs Hill Records, Somm, Albion, and Navona Records. Working with Mary Bevan, Kitty Whately, and Roderick Williams, Vann has engaged in a project to record songs of Vaughan Williams and Holst.