The original UK B-side to the Changes single supposedly has the intro - though I've not heard it myself. Is it available on any release?

By omitting the studio chatter, is the version on Re:Call 1 the same as the US B-side?

the UK single has the album version folded to mono. the US single is the edit in stereo.
the version on re:call is therefore a hybrid. there is a mono fold of the edit (US promo) but the re:call booklet shows the UK label in the book.

Ah I see, thanks. So does the B-side version start with the repeating last sax honk of Fill Your Heart? If so, I guess it's enough to recreate by converting the album track to mono.

no, it fades in... i'll dig it out, rip and upload a few seconds for you today.

here you go...
https://drive.google.com/ ... S1SNUIzY2s

Thank you for this!