The Gretzinger study basically shows that the modern English (not all the modern British) are a 3-way mix of Iron Age Briton, Anglo-Saxon and a French IA-like element. The last-named is mainly in south-east Britain while northern and western Britain with Ireland are the most Iron Age.We know since this study https://www.nature.com/articles/s41586-022-05247-2 that they did
Scots have 60.50pc Celtic-Italic-Beaker and 30pc Germanic.Modern English have about 45.5% of Germanic Y-DNA compared to 40% of Celtic-Italic-Beaker Y-DNA:
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Ethnic breakdown of Y-DNA in Europe
docs.google.com
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