https://www.youtube.com/watch?v=ZuVMbGCX7OU
This video was posted by user MellieTerry of an unshazamable song (ID'd by myself as "Cyan Daze" by Chimera) that features our old man speaking at the end.
OP lived in Gottingen, Germany, and likely recorded this off of BFBS (as BBC radio wouldn't have been accessible).
The song is mentioned as being played twice on the wiki. I initially assumed it was the 26 June 1993 show, but John's words after the song do not match.
The 25th recording doesn't feature the follow up words at all (and as mentioned before, couldn't have been recorded from BBC)
Just thought I'd let you lot know and wanted to ask if it's worth getting a recording of the full tape in case any more of this show appears (though it seems OP recorded from a multitude of stations so I'm not sure what the odds are)