Where an offender is serving a sentence on protection in conditions harsher than envisaged by the sentencing judge, a small adjustment to the head sentence and non-parole period may be warranted, but the adjustment must not render the sentence inadequate. A discount of 12.5 to 15 per cent for the utilitarian value of an early guilty plea with earlier admissions may be inadequate, and the probable shortness of any avoided trial is a relevant factor in assessing the utilitarian value of the plea.
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