Nice!
I thought about it: Maybe this song was recorded in the very early stages of recording process, during the first months Mark and Guy were alone at BG - remember that first diary entry - and thought they nailed it. Guy maybe played bass to be meant provisional - and later it was decided that it was perfect. Ruth and Paul Franklin were just overdubbed later during Mixing/Comping process. So there was no need for Glen Worf to take over the bass line.
LE