Don't think so but I have noticed when on holiday in the Vendee region that there area several memorials, carefully maintained and with appropriate Union Jack/Stars and Strips flying, that I beleve are provided as a mark of respect for aircrews who perished whilst trying to free their country.
Good novel, but I recall they "won" because they discovered that Enigma had been broken, won the Battle of the Atlantic as a result with Britain surrendering in 1944 due to the attrition that resulted. They didn't have to invade.
Len Deighton's "SS-GB" takes place in a Britain that has been...