The establishment of the episcopal see of the Britons in Gallaecia was more probably not because of a migration, but only because a group of Christians, led by their bishop, must have taken refuge in a place near the coast of Lugo, where they would establish and organize a personal episcopal see, which later reached a territorial demarcation. For this reason the diocese was it mentions in the "Suevo Parish" as Ad sedem Britonorum ecclesiae quae sunt intro Britones una cum Monasterio Maximi et quae sunt in Asturiis.
The establishment of the bishop's see for Britons in Gallaecia was more likely not a result of migration, but rather a group of Christians led by their bishop who took refuge near Lugo and established a personal episcopal see there. This later expanded to encompass a defined territorial area. The diocese is mentioned as "Ad sedem Britonorum ecclesiae" in the "Suevo Parish", which includes both those within Britain and those in Asturias.