This is for those who have watched the BBC ARENA documentary many, many times, that long speech by Mark before starting Down to the Waterline present in the video, where he says they will play new things tonight... listening to the audio from the Rainbow Theater 79 available now, we can see where this line comes from, in fact it is quoted at the moment the song Six Blade Knife ends, just before starting Once Upon a Time in the West, and not in Down to the Waterline, but whoever edited it The video made this montage to look like this for the TV show.
Still on the BBC ARENA video, there is a short scene in the song Les Boys where it shows David playing the entire time with a Sunburst Telecaster, (his main guitar during this period, he uses in all songs in the band's video live at the Rainbow Theatre, present at the BBC Arena), but there is a short scene in the same song which shows David using his black Thiline model Telecaster that he used for Wild West End and Portobello Belle, this was an editing error, but which reveals that more songs were filmed at the Rainbow Theater 79, in addition to those present at the BBC Arena. Who knows, maybe they'll dig deeper and find more interesting recordings, it's possible that complete footage of the show exists, that would be unbelievable, seeing Setting me Up, Southbound Again, or Portobello Belle live, it would be chilling...