On two occasions, in 1295 and 1299, he was elected
Archbishop of Dublin by the Cathedral Chapter of St. Patrick's. However, on neither occasion was he able to obtain
papal confirmation for his election, and he was never
consecrated as Archbishop. His failure on the first occasion was due to his non-appearance in
Rome within the required period, which gave grave offence to the Pope. His failure on the second occasion was due to the existence of a rival candidate put forward by the
chapter of
Christ Church Cathedral, Dublin, namely their
Prior, Adam of Belsham. The
Pope,
Boniface VIII, was annoyed at being asked to choose between them, and ordered both candidates to stand down in favour of
Richard de Ferings, the
Archdeacon of Canterbury. Due to the need for haste neither Thomas nor Adam had obtained a royal
licence for their election, which was bound to offend so formidable a ruler as Edward, even though Thomas has been a valued servant to both Edward and his father, King
Henry III of England. Edward accordingly did not actively support Thomas' candidature, and he made no objection to de Ferings' election. Both Thomas and Adam, lacking powerful supporters, and after being threatened with proceedings for
contempt of court, withdrew their candidatures. ==Vicar-General ==