705AD. After Eadwulf l was beseiged in Bamburgh castle, defeated and sent into exile, Osred I, son of Aeldfrith and cuthburga who was the daughter of prince Coenred of wessex, became king at the age of nine with the backing of Earldorman Berhtfrith and Bishop Wilfrid. (Orsred l, was adopted as Wilfrid's son).
Osred l, was said to have enjoyed a life of debauchery. Killing or exiling nobles and even having sexual relation with nuns. and yet somehow Bede still referred to him as a new Josiah.
709AD. Death of Bishop Wilfred.
711AD. Earldorman Berhtfrith acting on the kings behalf inflicted a crushing defeat on the Picts at a location somewhere around the upper Forth
716AD. Osred I, reached his majority it wasn't long before he was killed. his behaviour probably was what caused his distant cousin, Coenred and his brother or halfbrother, Ostric, to assassinate him. That and the fact that Coenred conveniently took up the crown after him.
The Anglo Saxon Chronicle simply states that he was killed, "South of the border." (Presumably the border with Pictland?)