Britain’s prehistoric catastrophe revealed: How 90% of the neolithic population vanished in just 300 years
http://www.independent.co.uk/news/science/archaeology/stonehenge-neolithic-britain-history-ancestors-plague-archaeology-beaker-people-a8222341.html
Arrival of Beaker folk changed Britain for ever, ancient DNA study shows
https://www.theguardian.com/science/2018/feb/21/arrival-of-beaker-folk-changed-britain-forever-ancient-dna-study-shows
It is happening again in Britain and it won’t take 300 years to replace the population.
Britain’s prehistoric catastrophe revealed: How 90% of the neolithic population vanished in just 300 years>>>>>>>
In Ireland the neoliths were know as Fir Bolg.
The beaker people likely were the Tuatha De Danann. The Celts (Melisians) subsequently replaced them.
Legend really is not much in conflict with the science.But the stories give a lot more character to the transitions than the dry science.
http://homepage.eircom.net/~kthomas/history.htm