If the case is referred again to the Court of Appeal there will be an opportunity for the defence to request transcripts of parts of the evidence directly relevant to the grounds of appeal. This would be unlikely to include a full transcript of JB's evidence.
I found this in the 2002 appeal - and in my distant memory this ties up with a comment I heard that the original transcript was no longer available.
"the Appellant's Evidence at Trial 137.
No transcript has survived as to the appellant's evidence in chief, although it seems clear from the summing up that it was entirely consistent with that which he had told the police. A transcript of his cross-examination is available. In cross-examination the appellant said Sheila Caffell had frequent delusions and had spoken to him of suicide."
"