DNA analysis of some 2000 people from the British Isles have been analysed and their genetic signature plotted, (Nature, vol 519). The distribution of the genetic clusters gave an excellent match with that of the major tribes inhabiting Britain in the period 550-600 AD, i.e. Anglo Saxon times. In other words, many people are still living in the same areas as their ancestors.
The DNA of people living in south and central England showed a marked contribution from Anglo-Saxon lineage, showing that the invaders married English women. Similarly, some 25% of the DNA of the group sampled from Orkney showed Norwegian ancestry, reflecting the Viking invasion. In Scotland there is a clear separation between the ‘Pictish DNA’ in the north east and the Scots/Irish DNA signature in the western part of the country