This is not exactly on topic but the theory that English are all Anglo-Saxon, and Scots, Welsh and Irish are Celts is outdated. Brits are almost exactly the same ethnically.
http://www.nytimes.com/2007/03/06/science/06brits.html
Most people seem to think Nordics are the superior Whites but this isn't backed up by the evidence. Brits have been the elite Whites of the last 1000 years. From Charles Murray's Human Accomplishment the raw amount of "significant figures" in science, technology, arts, literature goes Britain > Germany > France > Italy. Note this is despite Brits being outnumbered by Germans. Also many of the Germans listed are Jews.
Scandinavians are not as well represented as you would think. The Spanish are the true niggers of Western Europe with a large population and not much to show for it. Eastern Europe fails of course.
It's interesting to see Scots are perhaps the highest represented in accomplishment relative to their population (only 5 million people and a huge amount of scientific discovery), but this is from my own guesswork, Murray doesn't seem to try and adjust for population.