Hmmmm. I reckon your overhead is the same airfield as my photo, which is interesting, as the contemporary description I have for it is:
This airfield in Southern France was in operation two days after the initial landings. On D-Day Maaf planes were making emergency landings on it. (30/01/1945)
Which would mean mainland France.
I reckon your image is misidentified as I cannot line it up with Bastia-Poretta - even though the water course looks similar, there's no railway and the runway is totally out of alignment. However, I think I can line it up with where I think it is - no water course present today, but with the railway and runway matching.
Not had much experience with the GE overlay though, so I might be 100% wrong!