As the Duke of Wellington said about Waterloo, "It was a d----- close run thing." However, the more I read about the more I think the Germans couldn't have won it. Like Operation Sea Lion, they were trying to improvise things that should have been planned years before. The Germans did not use drop tanks so an Me 109 had about TWENTY minutes flying time over England, and German aircrews developed what they called "Channel sickness"-they were afraid of ditching in the Channel. If they bailed out over the UK they were POWs, RAF crews went back in the fight. German planes lost over the UK were a total loass, RAF planes were either salvaged-by the Civilian Repair Organization-or recycled. As happened to the German wrecks. The German bombers had inadequate defensive armament, while the fighter pilots always complained about being "chained" to the bombers. The Germans had only the Me109, the British had the Spitfire AND the Hurricane, RAF tactics were that the Spitfires fought the Messerschmitts and the Hurricanes went after the bombers.
The casting is like "The Longest Day", an esemble of big name actors. One story about the movie concerns the scene where Susannah York's character meets a pilot she has know for a while. When you see the man's face you realize he has been badly burned, the story is he was a REAL veteran.