Appealing (pun unavoidable) as these tales are, it's hard to reconcile them with reality.

> sealevel has risen by over 120 m
Indeed, and one of the areas thus submerged is what has come to be called Doggerland; but that was several thousand years before the neolithic.

A village that sank within the last few thousand years would still be only just beneath the surface and easily detectable. Likewise for an area a little below sea level that had been protected by a dyke. A tsunami could flood a large area, but the waters would subside and the land would still be there, even if the people and the buildings were obliterated.

Where cliffs have been eroded, at places such as Dunwich and Covehithe, any buildings would have crumbled to pieces.