For Commonwealth offences, the appropriate consideration for a guilty plea discount is the offender's willingness to facilitate the course of justice (not 'utilitarian value'), and the strength of the Crown case is a relevant factor in that assessment. Backdating a sentence for pre-sentence custody is not mandatory in every case, particularly where the period is very short and the sentencing judge expressly states it has been taken into account.
The full text is available to signed-in members, including the 14 later cases that cite this judgment.
1 of the 14 citing cases carry a classified treatment. How each court treated it is available to signed-in members.