The procession usually contains members of the clergy and the choir walking behind the processional cross.
[1] Occasionally, a service will also contain a recessional hymn, although in the Protestant tradition this is usually an organ voluntary.
With its longer cathedrals and churches, England was particularly rich in these and several are to be found in the Sarum Processional.
The processional hymns include "Of the Father's Heart Begotten" (Corde natus ex parentis, by Prudentius), "Ride On, Ride On in Majesty!
(Salve, festa dies, by Venantius Fortunatus) and "Jerusalem, my happy home" (by F.B.P.