Well actually I believe RWB complained because he had to hand his silemcer into the police for examination. So in a way there were multiple silencers. because I believe they wanted to examine Pargeter's silencer as well?
He said that happened in 1986 during the trial. That is not really multiple moderators in the sense that it is presented by Jeremy supporters.
They say there were multiple moderators taken from WHF and examined in 1985.