Gilbert Foliot
Foliot accompanied Theobald of Bec, the Archbishop of Canterbury, to a papal council at Reims in 1148. During his time there he was appointed to the Diocese of Hereford by Pope Eugene III. Despite a promise made in Reims not to recognise Stephen, Foliot on his return to England nevertheless swore fealty to the king, causing a temporary rift in his relationship with Henry of Anjou, Matilda's son, who eventually became King Henry II of England in 1154. When Theobald died in 1160, it was widely assumed that he would be replaced by Foliot, but King Henry nominated his Chancellor, Thomas Becket, instead. Foliot later claimed to have opposed this appointment, and supported Henry during the king's dispute with the new archbishop. Foliot was translated, or moved, to the Diocese of London in 1163, perhaps as consolation for not receiving Canterbury.
During the great dispute between Becket and the king, Foliot was reviled by Becket and his supporters. He acted as an envoy for the king on a number of diplomatic missions related to this dispute and wrote a number of letters against Becket which were circulated widely in Europe. Becket excommunicated Foliot on two occasions, the second of which precipitated the archbishop's murder. For a short period following Becket's death the papacy kept Foliot excommunicate, but he was quickly absolved and allowed to resume his episcopal functions. In addition to his role in the Becket controversy, Foliot often served as a royal judge, and was an active administrator and bishop in his different dioceses. He was a prolific letter writer, and some of his correspondence was collected after his death. He also wrote sermons and biblical commentaries, two of which are extant. Provided by Wikipedia