R v Jonathan Short

An extended determinate sentence may be imposed following an individual assessment that an offender presents a significant risk of serious harm through specified violent offences. An antecedent history of violence is not required. The risk may arise entirely from the circumstances of the offence, including planned and calculated violence following a perceived slight, together with immaturity or lack of insight. A trial judge’s assessment attracts considerable appellate restraint because the judge heard the evidence and observed the offender. Youth and the absence of previous violent offending are relevant but not determinative. Where the judge has considered personal mitigation and weighed it against aggravating features, an appellate court will not interfere unless the sentence is manifestly excessive or wrong in principle.

The appellant was convicted at the Crown Court at Norwich of causing grievous bodily harm with intent. He received an extended sentence of 12 years, comprising eight years’ custody and a four-year extended licence period, with a concurrent three-month term activated from an earlier suspended sentence.

By leave of the Single Judge, he appealed against sentence. He challenged the finding that he was dangerous, the imposition of an extended sentence, the length of the custodial term, and the treatment of his youth, character and changes in custody. The central issue was whether the trial judge was entitled to find a significant risk of serious harm despite the absence of previous violent convictions, and whether the sentence was manifestly excessive.

The appeal was dismissed.

1. The trial judge’s factual findings were properly available on the evidence. She had heard the trial and was therefore in the best position to assess the appellant’s dangerousness. Her findings showed planned and calculated violence: the appellant had threatened the complainant, armed himself with two knives and attacked when the complainant attended the address.
2. Dangerousness involves an individual assessment. An antecedent history of violence is not required. The reasons for imposing an extended sentence may arise entirely from the circumstances of the offence. The pre-sentence reports identifying a high risk of serious harm, together with evidence of immaturity and lack of insight, supported the judge’s conclusion.
3. An appellate court should be slow to interfere with a trial judge’s assessment of dangerousness. The Court applied the guidance in Howlett [2019] EWCA Crim 1224, observing that it would be rare for an appellate court which had not conducted the trial or seen the offender to overturn such an assessment. The decision to impose an extended sentence must not be taken lightly, but there was no proper basis for interference here.
4. The custodial term fell within the applicable category range and the extended period reflected the need for supervision after release. The judge had considered the victim’s continuing injury, the offending during the currency of a suspended sentence, totality, youth, lack of previous violent offending and the other personal mitigation. The sentence was neither manifestly excessive nor wrong in principle.

• Court of Appeal (Criminal Division) ([2026] EWCA Crim 77): dismissed the appeal against sentence.
• Crown Court at Norwich: convicted the appellant of causing grievous bodily harm with intent and imposed an extended sentence of 12 years, comprising eight years’ custody and a four-year extended licence period.