I haven’t done any formal study of British history, although I have a smattering of disjointed information from reading historical novels. Research before we left Australia included some audiobooks on medieval English history, but it is still a jumble I haven’t sorted out in my head. Nevertheless, I think I’m a lot more sorted on 1066. The Battle Abbey and Battlefield museum was excellent.
I have often wondered how the Normans were able to take England when they came over by boat but now I have a much better understanding, which I started trying to explain in this post. After a while I decided if you are as (weirdly) interested as I was (and why should you be?) you can google it.
William the Conqueror built an abbey at the site of the Battle of Hastings partly to atone for the terrible bloodshed which appalled even the people at the time who were used to such atrocities. Unfortunately, this was destroyed in the reign of Henry VIII by Cromwell.