Thomás Bairéad, Bishop of Annaghdown, died c. 1485.
Bairéad obtained a papal provision to the see of Annaghdown on 17 April 1458 despite the see been already occupied by Donatus Ó Muireadhaigh, who had held office as both Archbishop of Tuam and bishop of Annaghdown since 1450.
Despite crown support, Bairéad failed to gain local support, forcing him to retire to England, where he acted as suffragan in Exeter (1468–75) and Bath and Wells (1482–85).
In autumn 1484 he was sent by King Richard III on a diplomatic mission to Ireland, carrying instructions to the deputy lieutenant, Gerald FitzGerald, 8th Earl of Kildare, concerning negotiations with Conn mac Enri Ó Néill, lord of Tír Eógain from 1483 to 8 January 1493. The instructions pertained to the king's control of his titular earldom of Ulster. The primary focus of his mission was to travel among the Anglo-Irish of Leinster, Munster and Connacht dispensing gifts and gathering intelligence on the state of the lordship. His attempt to reconcile Maurice FitzGerald, 9th Earl of Desmond (d. 1520) with the king failed, but his overall mission was judged a success.
Bairéad died sometime after February 1485.