Had a "united kingdom" in post-Roman Britain defeated the Jutes, Saxons, and Angles in one way or another would it have been possible for the Germanic peoples to find their way to Iceland, Greenland, and eventually North America? If the Anglo-Saxons settled the lands of "Vinland" or "Anglia", as it would be called in this timeline, would the culture have been similar to that of Anglo-Saxon England in OTL or how do you think the Germanic culture of North America would change?