Evening F10, your assertion regarding German demands for a ceasefire and terms depends on your point of reference, in May 1940, in the direct aftermath of Operation Dynamo or in September 1940 or early 1941, when the Germans had in effect been decisively defeated in the Air.
So May, when Britain was at a low ebb and voices to negotiate for peace were vocal in some quarters, or September when military strength was rapidly increasing along with substantial and growing input and help from our Commonwealth friends.