Dark Ages in British Isles are fascinating, a dismal warlike time, in which people fight for survive. A dark age with deep blend of cultures.
6th and 7th centuries were a time when invaders (Saxons, Angles and Jutes) tried hard their destiny in a new world with the steel of their swords, shields and spears. Ancient people tried to resist, while they saw how their kingdoms are defeated and conquest by those “barbarians”, sorrowfully saw how his belowed world slowly disappeared off the face of the earth.
Couldn't forget to talk about the Picts also, who have always inspire great interest. Or about West, other island, as complex as Britain, Ireland in which many people were fighting for a piece land, their clans, livestock and supremacy.
In short, it is a world we know a little, but that it is like a magnet for history lovers: a time of war and great deeds, where few (almost none) kings died in his bed.
Brytenwalda with graphical add-on