151 We next consider that it is not reasonably arguable that either the head sentence or the non-parole period were manifestly excessive. The applicant was the oldest offender. Like the others, his offending was violent and sustained. The fact that GA struck the first blow did not mean that the applicant and his co-offenders were not the attackers. The plea was conducted on the agreed footing that GA struck the blow when in fear of being attacked. French was struck because he, particularly, confronted GA at the outset. He had a history of violent offending, and in this respect his history compared unfavourably with that of Thomas. Despite his plea of guilty, the extent of his remorse - regardless of the reason - was less than that of both Ludeman and Thomas. According to the evidence of the psychologists, his prospects of rehabilitation were more doubtful than were the prospects of both Ludeman and Thomas. The applicant did suffer some injury when struck by GA; but it drew a long bow to describe it as 'a significant injury to the head', warranting 'a very significant mitigation of penalty'. In some cases, injury to an offender may amount to extra-curial punishment, and lead to a reduction in the sentence which would otherwise be imposed. But we do not accept that the facial cut sustained by the applicant, and the resulting scar, had any significant part to play in determining the appropriate sentence in this case. Next, it is true that the applicant had complied with the terms of non-custodial orders in the past. But in our view the judge sufficiently allowed for this circumstance in both the head sentence and the non-parole period which she imposed. Finally, it is true that there was a smaller difference between the non-parole periods fixed for Ludeman and French than between the head sentences imposed on the two men for the principal offence. But unless the non-parole periods, as a proportion of the sentences, needed to be considerably different - and here they did not - that would always be the case.