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Haha but you haven't read the paper or noted the quotes above. The Irish and British Neolithic's homeland is mostly Northeastern France with a secondary flow from Brittany. Irish Neolithic lacks the Spanish HG ancestry that is in Spain and in their Farmer population. So as the paper says "this, together with the clear lack of Spanish HG ancestry in the Irish Neolithic (though again potential outliers, such as MillinBay6 exist) argues against any large-scale direct contribution from Iberian populations to the island, via the Atlantic."
But all Western Farmer populations are similar to Sardinians.
I'm reading now about the Bell Beakers and R1b which appeared in both Ireland and Britain in the late Chalcolithic and Early Bronze Age while R1b did not start appearing in the Iberian Peninsula until the Late Bronze Age. Also Ireland and Britain L21. So again no direct population movement from Iberia.
I'll add anything else that I find interesting later on.
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