I have improved the 3 first haplogroup migration maps (5500 BCE to 2500 BCE) and added a new map with the "missing link" between 2500 and 2000 BCE showing how R1b lineages spread during the early European Bronze Age along the Danube, and from the Unetice Culture to Western Europe (from 2300 BCE). The British, Irish, French and Iberian Bronze Age all started soon afterwards (2250 to 2000 BCE).

You can read online about the European Early Bronze Age (including the Unetice culture) (Google book).