There's an earlier linguistic, and necessarily biological, division of peoples reflected in the kinship of the Semitic group and the Indo-European group of languages. Unfortunately it's too far in the past for us to pin it down. In any case, the Hebrews ended up running around with Sumerian stories (see Eden, Ark, Noah), and there's two things we know that are very important ~ (1) The Hebrews were not Sumerian because Sumerian is not in the same family as Indo-European or Semitic languages, and (2) The Hebrew contact with the Sumerians was post-Flood, whatever that was, because Father Abraham lived in a land dominated by Semites, not Sumerians, although they kept Sumerian as a museum language for public records.
We also know from detailed DNA studies that the Hebrews are essentially the same people as the Kurds, and the Kurds are essentially the same as the Pashtun found generally in Afghanistan and Northwestern Pakistan.
That, BTW, would make the Hebrews simply the Westernmost Kurds. The Medes fall into that same category, but they kept their Indo-European language. More recently DNA studies have found that almost everyone living in Iran has the same markers as the people living in Iraq. The thought is that an Indo-European language was brought in by a small military elite in ancient times and then imposed on the population. The Iraqi/Iranian people are not the same as the Kurds, and the Kurds are not related to the Turks. The Turks, however, are probably related to the ancient sumerians, and/or their near relatives the Sa'ami!
Modern DNA studies do not support the theory that the folks in the UK are descendants of the Hebrews.
Remember, most of those old boys in the Middle East followed the custom of marrying their nieces and cousins fairly closely, so not much of their DNA escaped outside the immediate family or tribe!