Why Seelöwe could not have succeeded, RAF aside

I had come to a similar conclusion several years ago.

Assuming there was some residual Fighter Command capability to intefere with the Luftwaffe it is hard to imagine the Luftwaffe's being able to crush the RN's ability to defeat any invasion attempt.

Hitler was right to doubt the chances of an invasion. In which the 1st Canadian Division would have been in the front line.

Update: Corelli Barnett also argues that in a pinch the RN could have done it alone.