Update: A commenter noted that North England and Southwest Wales have different shape points. This is clear in the original PDF when I increased resolution. So ignore my comment about Brythonic Celtcs.
End Update
A few weeks ago I heard about the project to create a genetic map of Britain. Actually, I knew a bit about this because they’ve been publishing a few papers here and there over the years. But there is now an an exhibit up at The Royal Society Summer Science Exhibition 2012. My attention was drawn to this because British tabloids kept pushing headlines like “Cornish genetically different from other English!” I emailed one of the scientists associated with the project, Peter Donnelly, but he never got back to me. So I figured I would post anyway. Looks like they’re using thousands of samples at 600,000 SNPs. When they get a paper out it should be neat. On the other hand the map leaves a little to be desired. The clusters are clear, but what’s the genetic distance between the clusters in a relative sense? How were the cut-offs devised? I’m sure there are reasonable answers, but …