The fact that it was just him in a room playing guitar and singing and doing it as one bare, raw take is amazing. You can even hear a few embellishments and flubs on the studio version which is so beautiful. I genuinely wonder if George might've played piano live or something in the same take. Realistically I figure it must be an overdub, but the image is nice ❤
Officially, yes. It's an interesting one. A few months before the actual release of the instrumental of TPWBYT, a version appeared on streaming services that included this version of Missing Limbs and an instrumental of Fall For Me. I reckon these vocals are bleeding through the mic recording the acoustic guitar.