" It seems to me generally desirable that the Board should identify in broad terms the matters judged by the Board as pointing towards and against a continuing risk of offending and the Board's reasons for striking the balance that it does. Needless to say, the letter should summarise the considerations which have in fact led to the final decision. It would be wrong to prescribe any standard form of Decision Letter and it would be wrong to require elaborate or impeccable standards of draftsmanship ."
" 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."