[9] Some attempt was made to rely on the proviso, as it is still called, in s 668E(1A). I do not consider it is available to the Crown in the circumstances of this case. It is, of course, not the rule that everyone charged with a criminal offence is presumed to have a defence to the charge even though none exists. However, it is a fundamental principle that everyone charged with a crime is, on pleading not guilty, entitled to a trial at which his guilt is established according to law to the satisfaction beyond doubt of a jury, and not of three judges on appeal. In the present case, the problem is that the only claim to a defence that on the evidence the appellant might have had to the charge of murder against him was never presented to the jury at the trial. That being so, I do not see how the proviso can be invoked on this appeal. No jury has, after considering the evidence, such as it is, of self defence against provoked assault, yet decided or been asked to decide that the appellant was guilty of murder. For these reasons, it is not possible to say that no substantial miscarriage of justice has actually occurred or that the conviction should be affirmed.