Originally Posted by
Rheinstorff
and the RN's ASW capability wasn't particularly good at that stage of the War (as evidenced by the U-Boat's 'Happy Time').
Although it was also probably the most advanced in the world at the time the RN having at least thought about the problem in the inter-war period!
I should say I don't think the RN's ability to prevent an invasion in the event of Fighter Command being destroyed nullifies the RAF's victory in the Battle of Britain. If the RN had succeeded in preventing invasion, which I think it could plausibly have done with the plan as envisaged for Sea Lion, the losses would have made any subsequent operations in the Battle of the Atlantic much harder and probably led to Britain suing for peace as she was starved to defeat by the Wolfpacks.