Every religion in the world has in its history legends of flood.  Archeologists know that about 10,600 years ago the land bridge linking the UK to Europe was suddenly flooded, creating the islands of Britain.  There are a number of theories suggesting that remnants of a highly evolved culture arrived here about 8,000 years ago, established hill top settlements and arranged geometric patterns on the landscape in stone and straight line, for whatever reason, and that civilisation evolved from the Atlantic fringes east as opposed to from Mesopotamia west.  I've spent decades working with this, it makes sense to me.