As you said, all contemporary populations. So there is nothing to suggest that the British Isles was a Neanderthal genetic time capsule prior to occupation by t

As you said, all contemporary populations. So there is nothing to suggest that the British Isles was a Neanderthal genetic time capsule prior to occupation by the Anglo-Saxons, Romans, or Celts. Likely all of these incoming populations were equally as Neanderthal as the existing inhabitants.