[MarkBsnr]

Interesting.

The model that I am familiar with presents a general westward flow of the Celts through Germany to Britain.

[muawiyah]

That's based on language ~ not on ethnotype as reflected in mtDNA. All the Celtic Fringe and all the Germans and all the Scandinavians and even the Souvr'n Europeans descend primarily from people who were in the Western Refugia along today's French and Spanish border.

The languages came later ~ mostly as Middle Eastern (the Indo-European languages arose in the East around or near the Black Sea) agriculturalists moved West!