By the time this had happened, the Mesolithic populations in Britain were already isolated from their continental counterparts.

The rising sea level had made the English Channel and the southern North Sea impassable, cutting off the continuous land connection that had linked Britain to Europe.

Britain became an island, and its Mesolithic inhabitants became, in a practical sense, a different population from their continental neighbors — able to trade and communicate by boat, but no longer part of the same continuous landscape network.

Cheddar Man was born before or during this process of isolation.