Another mysterious audio featuring Peel. Any ideas where it comes from?

[johnpeel3904@...]

I have found a YouTube video, where Peel is going to play a session track from Boxer. I had originally thought it was from 10 November 1975 or a repeated session from 30 January 1976, but the audio doesn't seem to sound like it's from those dates, because he refers the session as it was sometime ago. Here is the audio below, it starts at the beginning of the video, please let me know where you think this show comes from?
 

 https://www.youtube.com/watch?v=cVqHIF_ylj8 https://www.youtube.com/watch?v=cVqHIF_ylj8