A number of the principles which govern appeals by the Director of Public Prosecutions are set out in R v Clarke and Director of Public Prosecutions (Vic) v Johnston. One is that an appeal should not be brought unless the sentence reveals such "manifest inadequacy or inconsistency in sentencing standards as to constitute error in principle". An examination of authorities suggests, as was conceded by the Director in argument, that manifest inadequacy alone will not be sufficient to warrant appellate intervention. Something more is required to ensure that prosecution appeals do not unduly circumscribe the sentencing discretion of judges. The inadequacy of the sentence must be "clear and egregious", the sentence being so disproportionate to the seriousness of the crime as to shock the public conscience and "undermine public confidence in the ability of the courts to play their part in deterring the commission of crimes". When resentencing the offender the appellate court must pay careful heed to the factor of double jeopardy, inherent in a Crown appeal, arising from the respondent's exposure to sentencing on a second occasion for the same crime. Because of the element of double jeopardy, Crown appeals are regarded as having a "rare and exceptional" character which calls for restraint, even where manifest inadequacy may be present, the Court having an overarching discretion not to interfere. Double jeopardy is a factor which must be considered in both the Court's determination of whether this Court should exercise its discretion to allow the Crown appeal and, where the discretion is exercised, as to the sentence which should be imposed. Any different sentence to be imposed must allow for double jeopardy.