I have heard rumors – and that's all I'm treating them as, rumors – that that's Geoff Nichols playing the bass on that song on the record.
In what follows, I'll post some of the possible bonus material that ended up not being included in this box set. Live in Manchester 1989
It has been confirmed not only by Geezer himself but also by many people familiar with his playing style that it is Geezer and only Geezer playing bass on the finished album.