They were genetically absorbed rather than entirely replaced.

Their descendants survive, but the descendants are the product of ten thousand years of demographic mixing, and the WHG heritage is a minority thread in a much more complex genetic tapestry.

Doggerland: The Lost World Of Britain’s Mesolithic

One of the most evocative dimensions of the Cheddar Man story is the world he was connected to: the now-submerged landscape of Doggerland.

When Cheddar Man was alive, the British Isles were not yet islands.