Link to the Graham Hancock website.
‘Doggerland’, the lost territories between England and France.
Lost land around Asia.
Lost territory, total. East Asia and Europe seem to have lost the most, and it’s the low level, fertile river estuaries where humans tend to build large cities that went first.
Mathilda's Anthropology Blog. 
It may be slightly misleading to consider Europe’s territory as truly ‘lost’ as the ice melted, since the majority of these areas, though above sea level during the Ice Age, were thoroughly blanketed by glaciers and likely uninhabitable.
Yes, there was just a few isles for the life in the North Atlantic, because the warm Gulf-Stream pass and melt ice on his road and pass near serie of isles, for example the Rockall Plateau.
And perhaps Atlantis is here, near the North Pole,
http://rockallatlantis.com/francais
Or here :
http://doggerbank.org/prehistoire.html