…or Wembley apparently! Huge THANKS to Bear for helping me solve this mystery.
(1) Pink Floyd January 23, 1972 Recorded live in Southampton (vinyl)
At the January 23, 1972 Southampton Guildhall show, Pink Floyd actually broke down entirely during “Money” due to a massive power failure and tech issues. They completely stopped playing the suite and had to fill the rest of the night with older songs like “One of These Days” and “Echoes”. They never finished the Dark Side tracklist that night.
Your bootleg is a direct copy of the famous BBC Radio 1 broadcast of the November 1974 Wembley Empire Pool show, repackaged with a fake 1972 date to look like a rare, early historical document.
(1a) Wintergardens Bournemouth, England February 22, 1972
(2) A Dark Side of the Moon Live in London, Wembley Empire Pool November 16, 1974

Pink Floyd Trivia: Did you know that Pink Floyd recorded Delicate Sound of Thunder over a five-night run at the Nassau Coliseum in Uniondale (Long Island), New York, from August 19 to August 23, 1988.