Simplify the following text for a Grade 8 native English-speaking person.
Original: The format was based on an Order drawn up by Edward White Benson , later Archbishop of Canterbury but at that time Bishop of Truro , in Cornwall , for use on Christmas Eve ( 24 December ) 1880 .
Simplified: The form of the service was started by Edward White Benson who was Bishop of Truro in Cornwall , for use on Christmas Eve ( 24 December ) 1880 .