" if a decision on a competent matter is so unreasonable that no reasonable authority could ever have come to it, then the courts can interfere"
"the issue is whether the release decision was so outrageous in its defiance of logic or accepted moral standards that no sensible person who had applied his mind to the question to be decided could have arrived at it. "
" 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. "
" In other circumstances, the Board may not be able to reach a conclusion that the relevant allegation is true or is untrue. It may be impossible to do so where the Board has not got the relevant evidence."
" In some circumstances, however, the Board may not be able to make findings of fact as to the truth of an allegation either because of an inability to obtain sufficiently reliable evidence or because it would be unfair to expect the prisoner to give an answer to the allegation when he is facing criminal or prison disciplinary proceedings in relation to that allegation."
" In such circumstances the Board, having regard to public safety, may take into account the allegation or allegations and give it or them such weight as it considers appropriate in a holistic assessment of all the information before it, where it is concerned that there is a serious possibility that those allegations may be true. But the Board must proceed with considerable caution in this exercise because of the consequences of its decision on the prisoner."
" 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."