Thanks for having a go The Flying Ox – glad you had fun trying at least!
nbt – tried Shazam and SoundCloud, plus my phone tends to pick up stuff (Pixel 2, probably using one of those services) but maybe there’s not enough of a clear musical stretch to identify?
Later on in the episode (15 min 50 sec) there’s another bit of music that sounds like it could be from the same piece
https://drive.google.com/open?id=1rp6beVJQrzZfWkwMazBPihwmTu2Ssf7u
I’ve gone through Einaudi’s more recent 7 days walking stuff (I have a fair recollection of his older stuff) but no joy.
The search will have to move to the emailing BBC/production company stage soon as it’s turning in to one of those things I can’t drop!