Besides being a soloist Iris has extensive  experience as a professional choral singer and regularly  joins various London church choirs or performance choirs as a freelance singer.

Church Choirs:

Westminster Cathedral
St Albans the Martyr Holborn
Farm Street Church of the Immaculate conception
Royal Hospital Chelsea Chapel Choir
St Marylebone Parish Church
St Pauls Knightsbridge
St Michael & All Angels
Holy Trinity Brook Green
Old Royal Naval Chapel Choir

Other Choirs:

Philharmonia Chorus

Choirs she has sung with in the past:

Purcell Singers
Choir of the 21st Century - Howard Williams conductor
Trinity College of Music Chamber Choir - Stephen Jackson conductor
Trinity College of Music Early Music Ensemble - Phillip Thorby conductor