“4. In our judgment it is now wholly clear that whenever a court is confronted by failure to take a required step, properly or at all, before a power is exercised (“a procedural failure”) the court should first ask itself whether the intention of the legislature was that any act done following that procedural failure should be invalid. If the answer to that question is no, then the court should go on to consider the interests of justice generally and, most particularly, whether there is a real possibility that either the prosecution or the defence may suffer prejudice on account of a procedural failure. If there is such a risk the court must decide whether it is just to allow the proceedings to continue. 5. On the other hand if a court acts without jurisdiction – for instance a magistrates’ court purports to try a defendant on a charge of homicide – then the proceedings will usually be invalid.”
“I think it would be wrong to fritter away the protection which the section intends to give to accused persons. It intends to give them protection in the broadest and most generous way by providing that the option of trial by jury shall be put before any accused person before the charge is gone into. I think the option ought to be put to him before he is asked whether he pleads guilty or not guilty. The protection is possibly even more necessary where he intends to plead guilty. He might plead guilty because, though he had no great confidence in the tribunal before which he appeared, he thought that by pleading guilty he would get a lighter sentence; whilst if he new he had a right to be tried by a jury he would prefer to avail himself of that right. I think it is immaterial whether in fact he knows that he has the right or not; he ought to be informed of it by the court…I am inclined to think that, the duty to inform having been imposed upon the court for the protection of all accused persons, the right to be informed could not be waived.”