If I remember correctly, we covered this about six (or more) years ago, while we were discussing St.Sheila and Radlical Linguistics. In particular, the "First Settler Theory".
From which, the foreword:
For more than two hundred years, research into the origins of the languages of Europe has been focussed on a single proposition: that they derive from *Proto-Indo-European, a theoretical language which is believed to be ancestral to Sanskrit, an ancient Indian liturgical language, and Old High German, which was used for Biblical translations in medieval Europe. These two languages are by thousands of kilometres and by thousands of years remote from each other. Despite the passage of more than two centuries, no evidence whatsoever has been found to support this thesis. The hypothetical "Proto-Indo-European" people have not been identified; the date of their migration, their ethnic composition, their place of origin, and their fate are as mysterious now as they were when similarities between Sanskrit, Old High German and several other early written languages were first pointed out in 1782. Perhaps the real Indo-European problem is that there has never been a new start in IE studies, as there was in social anthropology with Malinowski. A new start is proposed here. First Settler Theory offers a rational alternative. It traces European language back into the camps of the Palaeolithic reindeer herders who survived the disastrous eruption of the volcano Toba 75,000 years ago. Every aspect of this dramatic new theory has been explored and tested rigorously. Here at last is the key to the prehistoric languages of Europe, and to much more.
Sheila McGregor
Courthill House, near Inverkeilor, Angus, Scotland
Re Doggerland, chapter eight is of interest.
"The North Sea Zone (Nsz) (Flandrian, Scandinavian)" - pages 109 to 117
Why is she living in Inverkeilor? (you might ask)
https://www.bing.com/maps/?v=2&cp=56.65 ... __&style=sPerhaps from there one has a view over what would have been Northern Doggerland (c.Scalp Bank and Marr Bank).
Scalp Bank and Marr Bank are not so famous as Dogger Bank, but are still significant.
As Doggerland was not completely swamped by the Norwegian tsunami, but only partly, and then gradually split and submerged. Given the final phase probably took a good few 100 years, the Doggerlanders had plenty of time to move. For Northern Doggerlanders, the nearest current-day coastline is (roughly) to the north-west from Montrose to Berwick on Tweed. Which would be lowland Scotland, with a Gaelic Doggerlanderish. For Southern Doggerlanders, the nearest coastline is either west to England, (roughly) Grimsby to Lowestoft, with an English (Norfolk) Doggerlanderish, or south-east to Frisia where Doggerlanderish became Frisian.
The Isles of Scilly give us a modern mini-version of how Doggerland might have appeared before final submergence.