10 In my view, the appeal must succeed. Consistent with Hoch, the similar fact evidence of B and D should not have been left to the jury unless there was no reasonable possibility that the similarities between their evidence resulted from concoction. In the course of D's trial evidence, it emerged for the first time that it was possible that the content of her evidence had been concocted to reflect what she had been told by R. Whilst D denied a suggestion put to her that R had put D up to making allegations against the appellant, the possibility that D's evidence had been influenced to the point of concoction by what R said to D was not fully explored or tested and D was not asked any questions about the differences between the evidence she gave on the voir dire about her conversation with R and the evidence she gave on the trial about that conversation. The evidence, so far as it goes, could not support a conclusion that there was no real possibility that D's evidence was the result of concoction. Crown counsel has not submitted otherwise. In the absence of further evidence negativing the possibility of concoction, there was no sufficient basis for the admission of the evidence of B referable to the counts involving her in relation to the counts involving D, and vice versa. As the jury had before it prejudicial evidence which cannot be shown to have been admissible, the appellant has suffered a miscarriage of justice.