This was simply a settlement created by the descendants of people who'd holed up in the Western Refugia South of the Pyranees in Spain.
In fact, at this time the people who became the Celts were still pretty much on the Continent and hadn't reached Britain, but there were already people there. The Germans do not achieve a separate identity until they rebel against their Celtic overlords along the Danube. That's about 1000 BC.
Here's something for you to keep in mind. Ancient peoples can be identified by culture (pots, designs, etc.), DNA (taken from bone fragments), or language.
You get back a few thousand years everybody is a stone ager ~ or Paleolithic hunter/gatherer who makes his arrowheads and other stone tools in a certain pattern.
Then a little further toward our time they are making baskets and pottery that manage to leave behind impressions or shards. Again, that's culture.
Finally, we come to the age of writing ~ which starts in Sumer and spreads rapidly ~ and that gives us history and language.
This village in the Orkneys is pretty old ~ but not as old as some in Ukraine where people settled who'd been protected from the ice in yet another refugia.
There are places even older than those in the Middle East.
What is exciting here is that civilization in Britain appears to have been an indigenous product and wasn't shipped in by foreigners.
I’ve heard the term “beaker folk”...is that what these people were?