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British history starts in Dover, the cradle of British civilization. The oldest port, the oldest place-name.
History should be made interesting. For example, our Bronze Age Boat sailed the seas 750 years before Rome had two huts.
In Skara Brae on the Orkney Islands, in the very north of Britian, there are some stone buildings, including a whole village, that existed thousands of years B.C. and are largely intact.
As the saying goes: from Dover to Skara Brae.
Add to that Dover's Golden Graal, the Ringlemere cup.
As for King Harold at Hastings, if his army hadn't charged down the hill after the Norman cavalry, but had waited half an hour, being October, it would have become dark, and the Normans would have lost the battle.
They'd have had to surrender within days or a few weeks after running out of food.
There was no question of them sailing back to Normandy at that time of year.