As per the C5 doc and another of PB's pig skin experiments it now appears there's another attempt to undermine the silencer, which is obviously a step in the right direction given it underpins the conviction.
Many will recall ITV's Tonight programme from 2012 where PB attempted to illustrate that the marks on NB's back were caused by the barrel of the rifle and not the silencer. (Firing alone was not enough to cause sufficient heat so the barrel and silencer were heated up by a blow torch). This was an attempt to show the silencer was not used but obviously even if the test had any validity it would not have precluded JB or SC using the silencer and then removing it.
Perhaps unsurprisingly the CCRC rejected it. It also highlighted the fact it did not overcome the main obstacle with the silencer evidence ie the blood flake.
You say "Perhaps unsurprisingly the CCRC rejected it. It also highlighted the fact it did not overcome the main obstacle with the silencer evidence ie the blood flake. "
I think this is good example of how the Campaign Team are detached from reality. For them, it is easy to just assume that it was planted and so this expert opinion further confirms that.
But in reality, the CCRC and the Court of Appeal will look at all the evidence.
The expert opinion at the trial said it was a match for Sheila's and there was only a "remote possibility" of the alternative explanation - that it was a mixture of the parent's.