The more interesting scenario would have been the German defeat of the RAF and no immediate invasion.

The Luftwaffe would have been relatively free to pick and chose what targets to hit, and effectively cripple industry. The U Boats choking the Atlantic convoys - potential food riots breaking out, change of government and a negociated settlement with Hitler without German troops setting foot in England.

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“This is a tale you will tell your grandchildren, and mightily bored they’ll be.” Lt. Gen. Brian Horrocks commander of British XXX Corps September 16, 1944 prior to Operation Market.