This piece has just been on the BBC national news about a genetic survey carried out through Britain.
http://www.bbc.co.uk/news/science-environment-31905764

Should provoke some discussion! I 'm just surprised they can still find enough locals to show this. Since for instance I live in Norfolk, with:
Norman / Scottish / Irish / English ancestry
and the English is Staffordshire /Wiltshire/ Cheshire and the Isle of Wight! and the wife brings in Yorkshire /Lincolnshire.