Simon is a keen composer (the introit Thee We Adore, O Hidden Saviour, Thee was premiered on BBC Radio 3's Choral Evensong in 2006 and his new carol There is no rose was sung in the Advent Procession at York Minster in 2011) and enjoys playing many instruments including recorder, viola, clarinet and harp.
Brown's work with King's Voices included evensongs in chapel on Mondays in full term, visits to Ely Cathedral and St George's Chapel, Windsor, and tours to Venice, Florence, Paris, Amsterdam, Brussels, Dublin, Copenhagen, Bologna, Rome, Malta, Barcelona, Toulouse and Berlin.