 At the time, what became the east coast of England was connected to the areas of Denmark and the Netherlands by a low-lying land bridge, now known to archaeologists as Doggerland.The area is believed to have had a coastline of lagoons, marshes, mudflats, and beaches, and may have been the richest hunting, fowling and fishing ground in Europe at the time.Much of this land would have been inundated by the tsunami, with a catastrophic impact on the local human population.