3 In an affidavit sworn by Mr Fitzpatrick for the purposes of this appeal, he says as to the Fiveways break-in that he, Bradley Matthews, David Coombes and the appellant together travelled to Launceston to find a tattooist; they argued when the tattooist could not be found; he and Mr Coombes left the vehicle, and the appellant and Bradley Matthews drove away; he and Mr Coombes parted; he stole a car; he alone committed the Fiveways break-in; and he alone drove back to Hobart in the stolen car, together with the proceeds of the break-in. To further his appeal, the appellant seeks to have this Court receive Mr Fitzpatrick's affidavit. When considering an appeal against a conviction, the Court "may, if it thinks it necessary or expedient in the interest of justice" receive further evidence, the Criminal Code, s409(1)(c). This discretion is exercised against the background of the Criminal Code, s402(1), which is to the effect that an appeal shall be allowed if the Court is of the opinion "that on any ground whatsoever there was a miscarriage of justice". Similar provisions govern appellate courts in each of the Australian States and the Northern Territory. The applicable law is well established. Whilst the ultimate question for determination is whether it is necessary to admit the further evidence in order to prevent a miscarriage of justice, a preliminary consideration that bears on that ultimate question is whether the further evidence is "new" or "fresh", the latter being evidence that was not available to the appellant at the time of trial, actually, or constructively. Evidence is constructively available if it could have been discovered, or available at trial, by the exercise of reasonable diligence. When the further evidence is not fresh but merely new, an appellant will only succeed if the evidence either shows the appellant to be innocent, or raises such a doubt about his guilt in the mind of the Court that the verdict should not be allowed to stand. The law in this regard is canvassed in Howson v R [2007] WASCA 83; (2007) 170 A Crim R 401 by Roberts-Smith JA, agreed with by Buss JA and Millar AJA, in the following passage at pars42 - 44: