Is Shazam a search thingy for music? If so, I don't know what to do but I was thinking that the female singer sounds like it could be Kate McGarrigle, though I don't know the song. I love her singing and writing. (Oh tell the truth, Peter, you just love her.) Would you be able to find that? It's the one with piano.
That's a terrific film, right down to the very English narration straight from the cockpit of a beaten-up Hurricane. 850 miles on the drops, I'm sore just thinking about it. But notice the fine crop of cold-sores on John's lips at a later unspecified date; he can obviously get run-down. At least I can do that!
I've been trying to place his accent - is he from Hampshire?