Let's start with a point of divergence. We will say that either the Augustine mission sent to preach amongst the Anglo-Saxon kingdoms by Pope Gregory The Great either fails miserably within a few short years, or is never called at all. Instead the Anglo-Saxons remain largely pagan. Perhaps Oswald of Northumbria never seizes his father's throne as well, so neither is there an influx of Irish monks in the lands of Bernicia and Deira. I'm interested in how this would not only effect the English kingdom's relations with the continent, who may come to see them as an idolatrous people on the edge of the world in need of conversion by the sword in due time, but also by how this would affect whether England even unifies into one kingdom without the aid of a strong religious framework to go along with the power of secular rulers. Of course, this is without mentioning the eventual Viking invasions. Though one wonders if they'd find England as attractive to raid as in our timeline without a number of wealthy and undefended monasteries and churches to plunder.