I found the people of the British Isles article (Oxford Today, Trinity 2013, and here online) fascinating, but am puzzled how the research by Donnelly, Robinson and Bodmer links to that by Bryan Sykes and his team over many years, to which no reference is made. They all appear to a layman to have been covering the same ground. Is it a case here of academic rivalry over some some issue too arcane for a mere historian to grasp?