"The relevant rules (as to Crown appeals) may be stated in the following propositions: 1. An appeal by the Crown should be brought only in `the rare and exceptional case'...to establish some point of principle. The reason is that such appeals `represent a departure from traditional standards of what is proper in the administration of criminal justice in that, in a practical sense, it is contrary to deep-rooted notions of fairness and decency which underlie the common law principle against double jeopardy'... 2. Occasions may arise for the bringing of a Crown appeal (a) where a sentence reveals such manifest inadequacy or inconsistency in sentencing standards as to constitute error in principle...; (b) where it is necessary for a court of criminal appeal to lay down principles for the governance and guidance of courts having the duty of sentencing convicted persons ...; (c) to enable the courts to establish and maintain adequate standards of punishment for crime; (d) to enable idiosyncratic views of individual judges as to particular crimes or types of crimes to be corrected; (e) to correct a sentence which is so disproportionate to the seriousness of the crime as to shock the public conscience (as to the last three, see...at 213); (f) to ensure, so far as the subject matter permits, that there will be uniformity in sentencing... 3. A court of criminal appeal dealing with any appeal against sentence, including by a prisoner, is not a court hearing the matter anew, and is not entitled to substitute its own opinion for that of the sentencing judge merely because it considers the sentence inadequate or excessive. It may only interfere if there is manifest inadequacy or it is shown that the sentencing judge fell into material error of law or fact... 4. When, in response to a Crown appeal, the court decides to re-sentence an offender, it ordinarily gives recognition to the element of double jeopardy involved (in twice standing for sentence) by imposing a sentence that is somewhat less than the sentence it considers should have been imposed at first instance. 5. An appellate court has an over-riding discretion which may lead it to decline to intervene, even if it comes to the conclusion that error has been shown in the original sentencing process. In this connection, the conduct of the Crown at the original sentencing proceedings may be a matter of significance. These principles are unquestionably part of the law of this State; see R. v. Boxtel [1994] VicRp 54; [1994] 2 V.R. 98 per Crockett and Hampel JJ. at 104; and R. v. Vallis [1996] VicRp 18; [1996] 1 V.R. 269 in which the authorities were examined by this court. It is important, however, in the application of these principles, to bear in mind what King C.J. said in Osenkowski at 212-13: `[P]rosecution appeals should not be allowed to circumscribe unduly the sentencing discretion of judges. There must always be a place for the exercise of mercy where a judge's sympathies are reasonably excited by the circumstances of the case. There must always be a place for the leniency which has traditionally been extended, even to offenders with bad records, when the judge forms the view, almost intuitively in the case of experienced judges, that leniency at that particular stage of the offender'' life might lead to reform.'"