Um, again, I didn't mention ignoring Russia. I mentioned a confrontation in Baltic states. That would require some reading above. & Really England & France become issues after fall of Norway. Which I've tried to clarify, but with so far little success.
If they do declare war on Germany then war would go pretty much as it did. Germany attacks France, then on to England, but this time with different naval strength, ( lst's, destroyers etc).
Again, I am well aware of political bent of Hitler which makes the scenario a very unlikely one, but as I stated, it is purely strategic, not political in nature.
Supply of England after fall is a good point. food for civilians etc. But then that is the point of discussion, the what if's, how this or that might be encountered. One possibility is to have Germanys colonies returned in Africa & pacific in return, Germany vacates France & England & peace is restored before US involvement.
Anyway, it doesn't appear that much original thought is to be
found here regarding the various possibilities of said scenario-s.
Well Karnak & Edbert excepted. I wouldn't think an equal size navy would be the way to go, but rather one with fast Lst's, destroyers etc & shallow draft landing craft. More flying boats as well.