Aled Jones visits the Church of the Holy Innocents in Highnam, Gloucestershire, designed by Victorian philanthropist Thomas Gambier Parry and described by John Betjeman as England's most complete Victorian Church. Aled talks to the great grandson of Thomas Gambier Parry, and finds out about his famous son, composer of Jerusalem, an icon of British music. Other hymns include All People That On Earth Do Dwell, Angel Voices Ever Singing and Dear Lord and Father of Mankind.