“ there must have been a mistake as to an existing fact, including a mistake as to the availability of evidence on a particular matter; the fact or evidence must have been "established", in the sense that it was uncontentious and objectively verifiable; the appellant (or his advisors) must not have been responsible for the mistake; and the mistake must have played a material (though not necessarily decisive) part in the tribunal's reasoning.”
“The test to be applied in Mr Bousfield’s case was correctly identified by the Panel Chair throughout the course of the oral hearings as that contained in the Court of Appeal decision in R(Sim) v the Parole Board[2003] EWCA Civ 1845 .”