Warelwast was nominated on 10 April 1138[5] at a royal council held at Northampton.[6] Probably, he was elected by the cathedral chapter and his election was formally accepted by King Stephen of England at Northampton.[4] He was consecrated on 18 December 1138[5] by the papal legate Alberic, because the archbishopric of Canterbury was vacant.[4]
Warelwast went to the Lateran Council held by Pope Innocent II in 1139.[7][8] During King Stephen's reign, he was forced to recognize Baldwin de Redvers as Earl of Cornwall, but continued to date his charters by Stephen's regnal years.[9] He seems to have favored Stephen, but his diocese was not strategically significant in the civil war and he was little bothered by the disorders of the reign. He did excommunicate Matilda's half-brother Reginald fitz Roy whom she had made Earl of Cornwall, but this was because Richard had ravaged church lands.[4]
Warelwast failed to attend the Council of Rheims in 1148, and was suspended from his bishopric by Pope Eugene III for this. Warelwast was a patron of Baldwin of Exeter, the future Archbishop of Canterbury, sending Baldwin to Italy to study canon law.[4]
Warelwast died about 28 March 1155.[5] He was still alive on 7 February 1155 when he oversaw the translation of relics at Launceston Priory, but died soon after that. He was buried in his cathedral.[4]
Crouch, David (2000). The Reign of King Stephen: 1135–1154. New York: Longman. ISBN0-582-22657-0.
Fryde, E. B.; Greenway, D. E.; Porter, S.; Roy, I. (1996). Handbook of British Chronology (Third revised ed.). Cambridge, UK: Cambridge University Press. ISBN0-521-56350-X.
Matthew, Donald (2002). King Stephen. London: Hambledon & London. ISBN1-85285-514-2.