Watching the History channel the other day (Yes I know I watch a lot of Tv but I'm off work sick at the moment
)
The article was about the possible invasion of the UK by Hitlers army.(Op Sealion) It would appear that they had absolutly
NO method of getting massive numbers of troops across the channel. They tried to use barges that use the French canal networks but even after cutting the bows off to form a landing ramp they were not 'sea worthy' The soldiers that were due to use them found them very difficult to dissembark from and feared getting shot to bits. They had no landing craft such as used by the allies on D-day.
I know this doesn't answer the question posed by Kai-Petri, but I can't see that any large numbers of german troops could make it to England. Others may know different of course.
Regards Graham.