Interesting, I imagine England was originally settled by nomads crossing that stretch of land, and remaining after the waters receded. Imagine the change in history if Britain had been settled thousands of years later.
"Doggerland is the name of a vast plain that joined Britain to Europe for nearly 12,000 years, until sea levels began rising dramatically after the last Ice Age. Taking its name from a prominent shipping hazard—Dogger Bank—this immense landbridge vanished beneath the North Sea around 6000 B.C." - Koert van Mensvoort, Mapping a lost world, nextnature.net, 21 April 2009.