"... once one has or possesses something, be it an offensive weapon or a drug, one continues to have or possess it until one does something to rid oneself of having or possessed it; that merely to have forgotten that one has possession of it is not sufficient to exclude continuing to have or possess it."
"As to the second alleged misdirection, we are quite satisfied that to have forgotten that one has an offensive weapon in the car that one is driving is not in itself a reasonable excuse under the Act. But when such forgetfulness is coupled with particular circumstances relating to the original acquisition of the article, the combination of the original acquisition and the subsequent forgetfulness of possessing it may, given sufficient facts, be a reasonable excuse for having the offensive weapon with one. For instance, to take an example that was adverted to in the course of argument: if someone driving along a road where earlier there had been a demonstration were to see and pick up a police truncheon which had obviously been dropped there and were to put it in the boot of his car, intending to take it to the nearest police station, and then were to be stopped within a few minutes, he would have a reasonable excuse for having the truncheon with him in the boot of the car. If he were to forget that it was there and two years later were to be stopped and the truncheon were then found in the boot of the car, the circumstances of the original acquisition of the truncheon and the time for which that person had completely forgotten that it was in the car could constitute a reasonable excuse for possessing the truncheon two years after its acquisition."
"Depending upon the circumstances of the particular case, forgetfulness may be relevant to whether or not a defendant has a reasonable excuse for possession of an offensive weapon. The circumstances of the present case, including the fact that it was not the defendant who had introduced the weapons into his car, the fact that the weapons had been in his possession for a comparatively short period of time and the fact that he had given evidence as to how busy he was on the relevant night, which bear on the question of his forgetfulness, all as it seems to us, made the relevance of forgetfulness to the question of whether his excuse for possession was reasonable a matter for the jury."
"As we see it, in a case where the defendant does not rely upon the mere fact that he has forgotten that he has the article in his possession all will depend upon the circumstances of the case. It will then be a matter for the jury whether he has a reasonable excuse or not."
"This is not a case in which the defence was merely that the appellant had forgotten that he had the knife. His defence was that he had bought the knife as an ornament, that he had kept it at home and that he was simply transferring it, together with his other belongings, from one home to another without any intention of using the knife. In addition, it was his case that he had forgotten about the knife during the two weeks or so that his belongings were in the car. Assuming that those facts were put before the jury, as they would have been but for the ruling that the judge indicated that he would give, it would have been for the jury to decide where the truth lay and to say whether, in all the circumstances, the appellant had a reasonable excuse for having the knife with him or not. As we see it, save in the case where the appellant's sole excuse for having the offensive weapon with him is that he forgot, which was the position in McCalla, it will almost invariably be a matter for the jury whether he had reasonable excuse or not."