[2] Wulfstan's career is characterised by frequent swapping of allegiances, both among Viking leaders from Dublin and the Wessex kings.
Perhaps Wulfstan played the part of 'king-maker' in Northumbrian politics in the mid-10th century, or perhaps he was guided by self-preservation and the interests of the Church in Northumbria.
[4] In 944, Olaf Sitricson and his co-ruler Ragnald Guthfrithson were driven out from York; the chronicler Æthelweard wrote that it was "Bishop Wulfstan and the eoldormen of the Mercians" who were responsible for their expulsion.
By 951, Wulfstan appears to have supported Eric's claim to the kingdom of York over Olaf as he ceased to witness charters at the English court.
[2] The Anglo-Saxon Chronicle version D says that "because accusations had often been made to the king against him", Eadred arrested Wulfstan and took him to Iudanbyrig (the location of which is not known).