I saw this tour, "The Dark Side of the Moon" in a Nottingham venue (yes, THAT Nottingham, think Sheriff, Robin, etc) some date that I can't recall, just prior to this one. It would be the same set list and show. And in "The Great Gig in the Sky" the tour used 2 vocalists to pull off what one did in the studio - way too demanding
to put one voice through night-after-night!