"Without losing sight of the fact that the present case involved a conspiracy, the sentencing guideline for wounding with intent makes clear both (a) that a case of particular gravity reflected by multiple features of culpability could merit upward adjustment from the starting point before further adjustment for aggravating and mitigating features, and (b) that in some cases having considered the factors increasing seriousness and those reducing seriousness or reflecting personal mitigation, it may be appropriate to move outside the identified category range. This was a case of particular gravity with, as the judge explained, multiple features of culpability. The factors increasing seriousness identified by the judge were of particular strength. The notional determinate term of 18 years set by ... the trial judge ... was not excessive..."
"When considering the relevant adult guideline, the court may [our emphasis] feel it appropriate to apply a sentence broadly within the region of half to two thirds of the adult sentence for those aged 15 – 17 ... This is only a rough guide and must not be applied mechanistically. In most cases when considering the appropriate reduction from the adult sentence the emotional and developmental age and maturity of the child or young person is of at least equal importance as their chronological age."