Where a finding had been made that a father was within a pool of potential perpetrators of abuse against the child in question, and it was subsequently discovered that the teacher upon whose evidence the Judge had largely relied in making that finding had been in a collusive relationship with the child’s mother, it was necessary to retry the issue. Neither the mother nor the teacher had not been full and frank in their sworn testimony, and had omitted to mention important disclosures the child had made about other possible perpetrators: their evidence would have to be re-evaluated in a fresh hearing. Court: Court Of Appeal (England and Wales)