Polyphony was formed by Stephen Layton in 1986 for a concert in King's College Chapel, Cambridge . Since then the choir has performed and recorded regularly to critical acclaim throughout the world. Recent reviews declare Polyphony 'one of the best small choirs now before the public' (Daily Telegraph) and 'possibly the best small professional chorus in the world' (Encore Magazine, USA ).

For more than a decade Polyphony has given annual sell-out performances of Bach's St John Passion and Handel's Messiah at St John's Smith Square . These have become notable events in London 's music calendar and have been broadcast by BBC Radio 3 and the EBU. According to the Evening Standard 'no one but no one performs Handel's Messiah better every year than the choir Polyphony', and the Times 'would rate it among the finest John Passions I have ever heard'.

Polyphony's performance highlights include several BBC Proms, among them Arvo Part's Passio, and Purcell's Dido and Aeneas, regular festival performances, most recently at Aldeburgh and at the RTE Living Music Festival in Dublin , and numerous premiere performances. These include works by John Tavener in honour of his 60th birthday as part of the Barbican's Great Performers series, and works by Arvo Part and Pawel Lukaszewski.

Other broadcast highlights have been performances of works by Poulenc, Rautavaara, Tormis, Britten and Grainger for BBC Radio 3, works by Arvo Part for RTE, and an EBU broadcast of Bach's Christmas Oratorio. Performances abroad include concerts in France , Spain , Brazil , Denmark and Hungary.

Polyphony's extensive discography on Hyperion encompasses works by Britten, Bruckner, Cornelius, Grainger, Grieg, Jackson , Lauridsen, Lukaszewski, MacMillan, Part, Poulenc, Rutter, Tavener, Walton, and Whitacre. The CD of Britten, Sacred and Profane, won a Gramophone Award and a Diapason d'Or in 2001, and the choir's premiere recording of works by Arvo Part, Triodion, was Best of Category (Choral) at the 2004 Gramophone Awards. Polyphony also received Gramophone Award nominations in 2002 for the Walton CD, and in 2008 for Poulenc's Gloria, described by Gramophone Magazine as 'a performance of real distinction ... simply incredible'.

the USA , Polyphony's recordings have twice been nominated for Grammy Awards: in 2006 for Lux aeterna, a disc of works by Morten Lauridsen, and in 2007 for a CD of works by Eric Whitacre, Cloudburst. This 'staggering disc' (BBC Radio 3) spent more than fifty weeks in the Billboard Classical Album Chart, and has been hailed by the Times as 'extraordinarily beautiful', by CNN as 'outstanding', and by Classic FM Magazine as 'unmissable'.

Polyphony's latest CD is Handel's Messiah, recorded live at last year's performances at St John's Smith Square and released last month to critical acclaim. Reviewing the disc, Gramophone highlights 'the technical and communicative qualities of Polyphony's exceptional singing of the choruses', and, naming the disc Editor's Choice and one of the 50 best recordings of the year, Classic FM Magazine concludes 'there are few finer exponents of this great oratorio than Polyphony and Stephen Layton ... if you only listen to one Messiah this Christmas, Stephen Layton and Polyphony's live recording should be it'.