" 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"
" 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. "