As reported here last month a paper has appeared in Nature with detailed results of the People of the British Isles project. Aside from being behind a paywall it's written for an academic readership.
Now a good summary prepared for the volunteers who gave DNA samples is at
http://www.oxfordtoday.ox.ac.uk/sites/files/oxford/field/field_document/POBInewsletter06_March2015.pdf. It's written at a grade 9 level and so very readable even for the interested layman. Recommended. That simplification is quite an achievement in itself.
Two of the findings that struck me were:
The article also mentions that initial findings of a related project on the genetics of variation in facial features is expected to be published this summer.
- Danish Vikings, in spite of their major influence through the “Danelaw’ and many place names of Danish origin, contributed little of their DNA to the English population.
- a previously not described substantial migration across the channel (from Northern France) after the original post-ice-age settlers but before Roman times. DNA from these migrants spread across England, Scotland, and Northern Ireland, but had little, if any, impact on Wales.