As far as I know it has never been performed live in that version - the BBC-Version on most Bootlegs has a fake audience in the background - it's disgusting. But the music is great. Check the Bootleg "Rhapsody in Red". I recommend the other NOTW-Tracks from that BBC-Session as well.
Guten Tag und Guten Abend !!! We had a great time in Cologne. Drinking beer in the sunshine beside the Mighty Rhein brought back many memories for me..... (Brian May, 2004)