Bytton was elected for the position of Bishop of Exeter in 1291 and consecrated on 16th March 1292 he held this position for sixteen years. He died on 21st September 1307 being John Arundell's guardian for under a year. His wardship was transferred to Walter Stapeldon.
To cut Walter Stapeldon a bit of slack, he did have a lot to contend with once Isabella of France and Roger Mortimer arrived to overthrow Edward II.