I appreciate and welcome your criticism:

Northumbria was a separate entity from the succeeding united England and this is conveniently categorised in threes.
Danish contributions are subsumed within the general Anglo-Saxon designation...RE: Alfred & 1066I don't like it either but that's the fact of our national history as portrayed by officials.
The Tudor-Stuart-Hanover period is a single one of imperial colonialism.
Chronology IS lacking; please be generous!
Peripheral gives outsiders a clue as to the atmosphere and ambience of this obscure culture, since the world knows much more about Southern England due to its colonial-secretarial administration.
Surely we can do without the "touchy parts", being described with words like "ultra".

Let's do more meeting of minds!