The close-up of Ellie at the train station in the final scene was obviously done with a plain backdrop in the studio.
When Cora is hanging curtains, her mouth movements do not match the words she is speaking. She audibly speaks the word "France", by her mouth movements it can be seen that she originally said "Africa". Perhaps by the time of the film's release, "France" was a more likely scenario for the event she is describing, given real-life changes in the war that occurred since the film was produced several months earlier.
During an outdoor scene involving the rental car, there is a brief instance of the reflection of an crew member being seen, perfectly centered, in the car's right passenger "vent" window.