Figure 3: Major events in the peopling of the British Isles.
From: The fine-scale genetic structure of the British population
See Supplementary Note for further details. a, The routes taken by the first settlers after the last ice age. b, Britain during the period of Roman rule. c, The regions of ancient British, Irish and Saxon control. d, The migrations of Norse and Danish Vikings. The main regions of Norse Viking (light brown) and Danish Viking (light blue) settlement are shown. © EuroGeographics for the administrative boundaries (coastlines).
