This is quite cool, but COMPLETELY wrong. The IEs who Conquered Neolithic Farmers did not use bronze. Corded ware and Bell Beaker were Chalcolithic and Late Neolithic - They used Copper, and Stone. So did the Farmers. They were Chalcolithic and used Copper.
It is only AFTER bell beakers that we see the Bronze age start. It starts first in the Balkans and Carpathians, around 2700bc, after the Yamnaya Then the Proto Unetice culture in Central Europe, around 2200bc, and realted Post-Beaker cultures of the same time.
In 1800-1600bc the bronze age Reachers Northern Europe with the Nordic Bronze Age / Nordic Circle In Brittain it is debated, Although the first Cultural Manifestation is the Wessex culture around 2000bc, which is a Second migration out of Central Europe to the Isles.