One of Roy's most popular pieces, The Angels' Song is a Christmas carol with piano accompaniment. Originally performed by Hart Voices with children from Hampshire and Surrey schools, the song became the basis for one of the choir's lockdown recording projects, featuring contributions from the Farnham Youth Choir and Dorset based Folk duo "Ninebarrow".

It has since been performed by numerous choirs, including Salisbury Cathedral School, Streatham and Clapham High School, The Cheltenham Youth Choir, Latymer School and the Royal Grammar School (Prep) in Guildford.