Now, what if the Second World War was dealt quickly with Britain victorious, not bankrupted and not exhausted. How this is achieved does not need to concern in this regard, possibilities may range from Stalin breaking the Molotov-Ribbentrop pact and not supplying raw materials and Germany failing the ensuing 1940 campaign with a Franco-British victory in 1941 to radically revamped French Army rolling into Rhineland in 1939.
Without all the exhaustion, would Britain try to cling upon it's empire until the very last moment in Portuguese style or were the prewar trends already too strong?