Vaughan Williams wrote the piece as a tribute to the conductor Sir Henry Wood to mark the fiftieth anniversary of Wood's first concert. The solo parts were composed specifically for the voices of sixteen eminent British singers chosen by Wood and the composer. In some parts of the work, the soloists sing together as a "choir," sometimes in as many as twelve parts; in others, each soloist is allotted a solo (some soloists get multiple solos). The published score places the initials of each soloist next to his or her lines.