Got myself DNA tested. I seem to have a lot of Hunter-Gatherer heritage.
Those ancestors may have looked like the picture below: see Dark Skin, Blue Eyes – the Original Europeans
Not at all like me. Skin colour got lighter for Britons when we got less fresh meat, which is a good source of Vitamin D.
Update – July 2021. More data since 2017, when I posted this originally.
The maternal line is that of the West Asian farmers who changed all Europe.
The paternal line comes from the metal-age invaders.
Interesting to know. A record of past conquests.