Jon Courtney is a British singer, guitarist, and keyboard player, of the rock band Pure Reason Revolution. He was also the sole songwriter (except "The Bright Ambassadors of Morning" credited to Courtney/Jong) on their first two albums. Outside of Pure Reason Revolution, Courtney is involved in the DJ set All Bangers No Mash under the pseudonym "Cedo Simplex", and is one member of the duo KC Blitz.