Hopefully it may prove to be a precursor to a DVD or Blu-ray release, but film of Brian & Roger's concert performance at the Acropolis is showing in selected cinemas for one night only next Thursday 2nd March (link below).
Most London screenings (the only ones that I investigated) seem to be at 20.30, although a few are earlier (Camden Town at 18.30 is looking favourite for me, so that I can still get to a gig at the 100 Club afterwards!).
https://www.cinemalive.com/event/briana ... As4c499156