Northener here. I don't mean to take away from your point, because you are mostly correct, but my school at least did teach us about the harrying, though I can't remember how much detail, but it was at least a few lessons on the aftermath of 1066 and how the Normans took control.

I will mention (mostly because I find it funny) that I remember hearing about a planned revolution in Britain (around the time of other European revolutions) that was called off because of the rain.