You're referring to the 2nd BBC session recording, not the first (which was released on At The Beeb and At The BBC), because I don't hear anything out of the oridinary on the 1st session recording, but lo and behold, there's a bit a chatter under the first four seconds of the 2nd session recording.
I just looped that bit and listened to it a bunch of times, all I can make out is: "Tell me what(unintelligable) play this." Though I freely admit I may be totally wrong. The syllables certainly sound like that. The voice sounds casual, not like Freddie or Brian giving instruction, or even of someone in the same room as them. It might even be unrelated and a bit of ghosting from a previous recording on the tape, which wasn't erased properly.
Further more, because my copy did not come from an official source, it may well be a remanant of the crassfade from what ever John Peel played immeadiately before "Liar" on the broadcast (the tail end of some commercial dialogue or the intro to the song), or even a bit of studio chatter caught by the BBC microphone during the broadcast.
Honestly, if that's it, I don't know enough about the context in which these BBC tracks were aired. Anyone here ever hear the original broadcasts? Where there commercials between songs, or interview segments, or Peel simply talking?
Thanks for the topic, Thanks...fascinating...