They show up later as Vikings ~ but they were not terribly well educated when they left Europe ~ a real Dark Ages type people.
So, Freis who went West ended up in England (that's the 'en' in England, and those who went North suffered the punishments of hell with recurring famines, plagues, and all that. Their technological prowess declined substantially until they got the boat design that enabled them to RAID EUROPEANS ~ which is another couple of hundred years later.
The Vikings are a 'culture', not a genotype.
To the English mix, one needs to add the arrival of North Africans (many of whom were probably the common ancestors of Berbers) which started roughly 200 BC, by encouragement of the Roman ruling class. Therefore, for the millions of people who claim English blood, a good share of them (particularly if they trace back to the Colechester area) have North Africans in the mix.
Colechester's origins actually date back to Ancient Carthage. A century or so after the Romans destroyed Ancient Carthage in the Third Punic War (146 BC), Julius Caesar allowed the city to be rebuilt. By 100 a.d., it had grown to a city of a half million, second only to Rome in size in the western part of the empire.
The decline begin shortly thereafter as the surrounding area begin to turn into desert. The Angles, Picts, Celts and Brits, meanwhile were a rather unruly lot and difficult to rule so the Romans actively encouraged their North African subjects to emigrate, where they founded Colechester.
The old nursery rhyme Old King Cole refers to the king of Colechester who was of North African stock. His blackness, of course, is subject to debate since even a bronze skinned Berber would look black to the fair skinned locals.
But, I digress. As you know, the various groups fought for control of the British Isles until the Normans (yet another group seeded by vikings) came out victorious in the pivotal October 14, 1066 Battle of Hastings. But that still didn't settle the matter completely as the Irish, Scots, Welsh and others will tell you.
BTW, I really enjoy your posts and added knowledge of history, even if I don't always agree. You appear to be very well read on the subject. Is it a professional specialty or just a hobby (like me)?
The show was never advertised as being a factual series, but rather a different viewpoint on how the Vikings may have lived. So far I have really enjoyed the series in that respect and I think they did well with the clothing, weapons, and such. My biggest complaint would be that I have been brought back to reality several times when they use words or phrases that would in no way have been used back then such as “culprit”, “do you have the balls?”, “rape”, and others.