This is the actual question from RS and Chester's reply.
Do you recall much from the reunion show with Peter Gabriel in 1982 at Milton Keynes Bowl?
[Laughs] That was fun. I guess they were never able to release it because Peter is pretty spontaneous and it drove the sound engineer crazy. They went over all the details in soundcheck and we rehearsed the day before. But they set up mics around the stage where he said he was going to be. Come the day of the show, Peter was wherever he was at the moment, which wasn’t where he said he’d be the day before. Unfortunately, they never had enough of his clear vocals to release it, or anything.
This might be a very diplomatic answer, Mike Rutherford has always claimed it wasn't recorded. Peter Gabriel's keyboard player "Larry Fast" recalls watching the video of the show on the 3rd or 4th October as he was rehearsing in Peter's band for the 1982 tour.
Still, that's what I believe you were paraphrasing or quoting from.
TGA