Those could also be the ancient Iberians, who with similar groups inhabited Europe before the Germans or Romans or Celts came on the scene.
It's certainly possible that the ancient pre-Celts who got pushed down into Spain by subsequent arrivals and those who were pushed into Ireland or Wales or Scotland had similar DNA.
My neighbor who is Texas English, claims they only married other English people for generations in texas. He had 72% English ancestry, not Anglo-Saxon, ect. He told me he had higher % of PURE, pure I tell ya English bloodlines than most people in England today; all quite humorous anyway you look at it.