Maybe English ports would be used in Raids further south to Iberia and even Atlantic-facing North Africa. I could see Norse adventures into places like Brittany, Galicia, or even the Benelux. Maybe a concerted effort by the Norse-Gaels in the Isles and Orkney along with Norse England conquer most if not all of Scotland; Same goes for Ireland though that could easily just be relegated to the coastal ports within a few decades.
A Medieval Norse-British empire based out of Jorvik would make an interesting TL.
It would be a good source for raiding, though I think more would be cross channel or directed to Ireland. Otl we have Norse getting as far South as the Egypt (through the Straits of Gibraltar) and as far East as the Caspian Sea. What strikes me is the somewhat more Norsified population could add weight to say, a conquest of Ireland. I think Ireland is an easier target than Scotland. That said, if say the fall of Ireland lead to a weakening Gaelic culture, we could rename Scotland Pictland.
It would be interesting to see how culturally different having the centre of political power be York/Northern England rather than the south. I think it’s still likely that England gets conquered by the Normans or some other French dynasty. The demographics were just too much in the favour of France.
I'm not sure on this one, considering how disunited France is. Also Normandy as we know it is butterflied and half the OTL Normans probably living on a farm in Wessex.
Would this Dane dominated England unite into a single "Kingdom of England" or would it remain disunited (Danish lead East Anglia, Kingdom of Jorvik, etc)? While unification could happen in the long run, I don't see Guthrum or Halfdan Ragnarson willingly giving up their hard fought kingdoms' autonomy in their lifetime
Yeah, I agree with a divided Isles, though the South probably eventually wins, with Northumbria being caught between Scotland and Guthrumland. But a Dublin/NorthUmbria Axis would be is a stronger position.
But of mixed bag inso far that a lot stays the same, but a lot also changes.
First of all, much of the danish elite would quickly become Christian, within a generation or two. The political advantages it provides, plus the constant interaction with a thoroughly christianized population would see to it.
I'm thinking more like 3-5 generations and here's why. I also see it extending the life of Norse Paganism atl.
1) Alfred isn't founding monastararies or sponsoring religion. In fact a fair few otl monastaries are probably abandoned. Maybe some Bishoprics aren't filled, and the organization of the Church suffers. Priests aren't replaced and basically the Church Heirarchy is neglected. Most of the effective missionaries otl were Anglo Norse Christians. Those priests aren't being trained atl.
2) Odin is good, hasn't he proven it with our victory. You would have less of a narrative of the White Christ being a god for 'winners'.
3) Otl, 3-4 generations in, Norse Paganism was a going concern when Northumbria fell in 954. Under worse circumstances I don't see it taking a shorter time.
4) Cultural assimilation (both ways), makes Norse stuff more familiar. That means if the Priest is dead, the nice Anglo Dane couple feel okay asking the the Godi to bless the marriage. The Seide woman telling fortunes doesn't discriminate. As Christians Hierarchy is less availible, people make compromises and feel more and more comfortable with them and the kids and Grandkids know no other way. Otl in Northumbria, you saw the Saxon population adopting customs (going both ways) but I think it would be more Norse. I suspect all of these
The use of Old English as a written vernacular in England would be greatly reduced in this timeline. Old English would have more Norse in it and possibly the elite vocabulary would be Norse in origin. Unlike in OTL when we had to wait until the Middle English period to see most of the Norse words in English, it would be evident that Old English has a strong Norse element when we finally get a few written texts. Latin in England would also be affected but unlike Old English it would eventually recover (although perhaps not to pre-Viking raid levels). One interesting consequence would be the fate of the Anglo-Saxon Chronicle. While the Chronicle wasn't started by Alfred the Great, it was strongly supported by him and thus it might disappear in this timeline. Future historians might have problems working out the finer details of this time period.
I'm thinking you could have some fun cultural interactions/changes here. Saxon writing becomes rarer, but how about Runic scripts on Vellum or other such coolness. I like, everyone think Christianization is probabale or a near certainty, but if you were to find a 'solution' for to counter or role back Christianization, this would be the ideal circumstances of close contact and comprehension that such a solution might be found.
Thanks everyone for the interesting answers.