10 In elaboration of that general finding, the judge made two sets of factual findings. The first set of findings were:
(i) that the two men prepared a plan to set upon the victim and to threaten him with the gun;
(ii) that, at the time they left Bobak's unit, one of the offenders had armed himself with the plasterer's hammer to the knowledge of the other offender; and
(iii) that, at least by the time the attack on the victim commenced, each of them, using the plasterer's hammer, intended to inflict on the victim the type of very grave harm which was in fact inflicted on him, knowing that he would be unarmed and virtually unable to defend himself from such an attack.
So far as the applicant is concerned, the second in this set of findings must be interpreted as one that Bobak had the plasterer's hammer in his possession when they left his unit to the knowledge of the applicant.
11 The judge immediately went on to make the second set of factual findings:
(i) that, although the applicant did not himself inflict the injuries on the victim, he was a participant in a joint criminal enterprise with Bobak to maliciously inflict grievous bodily harm to the victim with intent to do so;
(ii) that the applicant knew, by the time the attack commenced, that Bobak was going to use the plasterer's hammer to attack the victim in the manner he did and to inflict on him the type of very grave harm which was in fact inflicted; and
(iii) that, having such knowledge, he was present and participated jointly with Bobak in the attack on the victim.
12 The differences between the two sets of findings, so far as they concern the extent of planning and premeditation involved, are significant in various ways to the submissions made by the applicant in his application for leave to appeal.
(A) Finding (i) in the first set of findings imputes to both offenders at the time they left Bobak's unit an initial plan to "set upon" the victim and to threaten him with the gun, whereas finding (i) in the second set appears to impute to both offenders an initial plan to maliciously inflict grievous bodily harm to the victim with intent to do so.
(B) The expression "set upon" appears to have been the judge's own inference. It is not defined, but it obviously means some form of violence (albeit not with the plasterer's hammer). No complaint has been made concerning the expression used, and counsel appearing for the applicant in his application for leave to appeal accepted that it was an appropriate inference from the agreed facts.
(C) It is not entirely clear from the judge's remarks on sentence just when the alternative initial plan referred to in the second set of findings (to inflict grievous bodily harm to the victim) was formulated but, in order to be consistent with finding (ii) in the second set of findings, it is necessary to interpret this alternative initial plan as having been agreed to only at the time the attack commenced. Such an interpretation considerably reduces the severity of the violence to the victim which had been planned and premeditated when the two men left Bobak's unit.
(D) The first set of findings imputes to the applicant knowledge that Bobak had the plasterer's hammer with him from the time they left Bobak's unit, but it is important to note that the judge did not make any finding of fact that the applicant knew from that time that Bobak was going to use that tool in the way he did. It was not argued otherwise by counsel for the applicant. Although the applicant's knowledge that Bobak was in possession of the tool from the beginning could in some circumstances have extended the original joint criminal enterprise (merely to set upon the victim and threaten him with the gun) to include violence with that tool - if he had participated in that enterprise with the contemplation that such use of the tool in the way Bobak did use it was a possible incident in the execution of that enterprise - that is not how the judge approached it. Again, this considerably reduces the extent of the planning and premeditation involved at the time the two men left Bobak's unit.
13 The first submission by the applicant is that it was not open to the judge to find that, at the time they left Bobak's unit, he knew that Bobak had armed himself with the plasterer's hammer. Such a finding was a matter in aggravation of the sentence to be imposed. It therefore had to be established to the satisfaction of the judge beyond reasonable doubt: Regina v O'Neill [1979] 2 NSWLR 582 at 588; Regina v Story [1998] 1 VR 359 at 369; The Queen v Olbrich (1999) 199 CLR 270 at [27].