here's a quickie, involving the widespread (* potentially global) bronze-age mediterranean trade shipping routes.
Surely, there's nothing stopping certain Sea Faring Nations originating from ancient Turkey and other pre-Christian ports in the eastern Mediterranean from trading with or settling in Britain, circa 1300 BC.
Was the Coelbren language, and/or remnant Welsh i.e. Khumric, the trade-speak Esperanto of its time?
* New World cocaine and nicotine found in (a large percentage of) Egyptian mummies.
