"Left to the German High Command the war would never have been waged, on analysis, given 20 x 20 hindsight, I have always been amazed that they ever thought of attempting it. But Hitler built up Germany's armed forces with only one thought in mind - to take on Communist Russia - He lost."

Dead right. I'm amazed that they ever thought of attempting it too. Talk about hubris! They had the bad luck to be under the command of an unstable man who made decisions on the basis of pure emotion, not logic.

The only point on which I think I disagree with you (and it's purely hypothetical, mind you) is that I don't think the British could have defeated Germany on their own (assuming the Germans never attacked Russia). I think they would have simply fought each other to a stalemate, and then would have eventually negotiated and the war would have ended with no clear victor.

When that happens, both sides tell their people at home "We won.", much celebrating and chest-thumping is done on both sides by the media while many hard questions are asked behind closed doors by the political and military leaders, and then the planning begins for the next possible future go-round while both sides consolidate and re-assess their position in the world.

Anyway, it's interesting to speculate on what might have been.