[2] In 681, during the reign of King Ecgfrith of Northumbria, Trumwine was appointed "Bishop of the Picts" by Theodore of Tarsus, then Archbishop of Canterbury ("Bishop of those Picts who were then subject to English rule", i.e. those living north of the River Forth paying tribute to Northumbria).
[4] After the defeat and death of Ecgfrith at the Battle of Nechtansmere in 685, Trumwine and his monks fled and dispersed.
He retired to the monastery at Whitby, [5] then ruled by Ælflæd, Ecgfrith's sister and St. Hild's successor.
[7] Whatever the case here, the Anglo-Saxons were defeated, expelled from Southern Pictland, and the episcopal establishment at Abercorn was hence abandoned and the diocese ceased to exist.
The territory of modern West Lothian hence probably passed into the hands of the Verturian kings, although it is also possible that the British of Strathclyde took it over.