Chris Scott,
Your: "After all, would it really have made any difference if the Germans had taken over Blighty?"
Ask the old folk of Hamburg (or dozens of other German cities) what their Fathers had told them.
Ask the still thousands of living survivors of Auschwitz, etc what they think !
Ask in any of the Western European lands overrun by Hitler !
Ask the Russians !
But re-reading: "........we have the benefit of the authoritative and enlightened perspective of talented BBC editors and presenters.......",
it occurs to me that your tongue might have been in your cheek when you wrote this !
Even so, it is a poor jest.
Danny42C.