Doggerland is a name given by archaeologists and geologists to a former landmass in the southern North Sea that connected the island of Great Britain to mainland Europe during and after the last Ice Age, surviving until about 6,500 or 6,200 BCE, though gradually being swallowed by rising sea levels. Geological surveys have suggested that Doggerland was a large area of dry land that stretched from Britain's east coast across to the present coast of the Netherlands and the western coasts of Germany and Denmark. Doggerland was probably a rich habitat with human habitation in the Mesolithic period.
The archaeological potential of the area had first been discussed in the early 20th century, but interest intensified in 1931 when a commercial trawler operating between the sandbanks and shipping hazards of the Leman Bank and Ower Bank east of the Wash dragged up an elegant barbed antler point that dated to a time when the area was tundra. Later vessels have dragged up mammoth and lion remains, among other remains of land animals, and small numbers of prehistoric tools and weapons that were used by the region's inhabitants.

A good BBC Doc on the latest finds and research.