Actually, you know, I had a long walk with the dog, and I realized I was over thinking things.
No invasion of England is actually needed to force Britain into an armistice if there's no Churchill and Edward VIII is on the throne.
The shock of France crumbling in just 43 days (as opposed to grinding it out to the end over 4 years as in WWI), followed by the loss of a significant portion of the BEF into captivity would be enough to shake the British government to it's core and raise calls for an armistice.
You know, I can't help but wonder if people were calling for that in May 1940 in real life. I'd sure love to read British newspapers from back then.
It's just that you know...it's a CHALLENGE, damnit to make a Sea Lion that's somewhat plausible.
