Sentencing Historic Sexual Offences Committed in Early Childhood: resolving uncertainty in age and charge scope, and applying Ahmed to the custody “bar”

Case: R v OIM (Attorney General’s Reference under s.36 Criminal Justice Act 1988)
Court: England and Wales Court of Appeal (Criminal Division)
Neutral citation: [2026] EWCA Crim 1173
Date: 30 July 2026
Judges: Lord Justice Popplewell, Mrs Justice O’Farrell DBE, HHJ Andrew Lees

1. Introduction

This Attorney General’s Reference concerned whether a suspended sentence imposed for serious, penetrative historical sexual offences against the offender’s younger sister (“KB”) was “unduly lenient” within the meaning of s.36 of the Criminal Justice Act 1988.

The offender (now an adult) pleaded guilty to five counts: two oral rapes of a child under 13 (s.5 Sexual Offences Act 2003), attempted vaginal rape (s.5), and two counts of assault by penetration (s.6). The sentencing exercise was complicated by:

• Uncertainty about dates and ages (both parties and the sentencing judge proceeded on inconsistent assumptions).
• Mischaracterisation of the indictment (the sentencing judge treated one rape count as a “multiple incident” count when it was in fact a single incident).
• The proper legal approach where the offender committed the offences as a very young child but is sentenced as an adult, governed principally by R v Ahmed [2023] EWCA Crim 281 and Sentencing Council guidance.

2. Summary of the Judgment

The Court of Appeal refused leave, holding that the sentence was not unduly lenient.

Although the Court identified significant errors in the factual basis adopted at sentence (age and the “multiple incident” misunderstanding), correcting those errors did not make the sentence more lenient; rather, on the correct basis the offender should have been treated as no older than 11 (nearing 12) at the time of the last offence and sentenced for four specific occasions (two oral rapes plus two further incidents), not “numerous” oral rapes. On that corrected footing, custody would not have been available at the time (absent the exceptional “grave crime” route), and there was no “good reason” (per Ahmed) to impose a more severe outcome now.

3. Analysis

3.1 Statutory and guideline framework

• Unduly lenient sentence jurisdiction: s.36 Criminal Justice Act 1988 permits the Attorney General (here, the Solicitor General) to refer certain sentences to the Court of Appeal where they are “unduly lenient”.
• Offences: ss.5 and 6 Sexual Offences Act 2003 (rape and assault by penetration of a child under 13).
• Youth sentencing availability at the time:
  • A Detention and Training Order (DTO) (max 24 months) was only available for a child aged 12–17 and (as relevant here) only where statutory preconditions were met, including “persistent offender” status in the relevant youth sentencing context discussed in the Children guideline.
  • For an 11-year-old, the Court accepted (as common ground) that a DTO would not have been available.
  • The Crown Court’s additional power for “grave crimes” under s.91 Powers of Criminal Courts (Sentencing) Act 2000 (as in force at the material time) could, in principle, permit detention for certain very serious offences, but the Court stressed its exceptional nature for a child so young.
• Sentencing Council Guidelines: the Court placed particular weight on:
  • Sentencing Children and Young People (the “Children guideline”), including its emphasis that custody is a last resort and is expected to be particularly rare for children aged 14 or under (paras 6.45–6.48), and its discussion of “grave crimes” (para 2.10).
  • Sexual offences – Sentencing children and young people, emphasising preference for robust community disposals (e.g., YRO with intensive supervision and surveillance) unless custody is “unavoidable”.

3.2 Precedents cited and their influence

(a) R v Ahmed [2023] EWCA Crim 281

The Court treated Ahmed as the controlling authority. It reproduced and applied the structured approach at [32], which—distilled—requires:

• Applying the Children guideline even if the defendant is now an adult, unless contrary to the interests of justice.
• Identifying the maximum sentence legally available at (or shortly after) the time of offending, given the offender’s age and youth sentencing restrictions.
• Taking as a starting point the sentence likely to have been imposed had the child been sentenced promptly.
• If custody was not legally available then, custody cannot be imposed now.
• Even where custody was available then, exceeding the youth maximum now requires good reason; adulthood alone is not a good reason.
• “Subsequent events” can justify adjustment, but the court must still ask whether there is good reason to impose a more severe sentence on the adult than would likely have been imposed on the child at the time.

In OIM, this framework drove both the correction of the factual basis and the legal conclusion that the sentence could not be characterised as unduly lenient.

(b) R v XYZ [2026] EWCA Crim 845

The Court cited R v XYZ [2026] EWCA Crim 845 for “the correct stepped approach” to applying the guideline on sentencing children and young people for sexual offences. While XYZ was not elaborated in detail, its citation underscores that, even in penetrative sexual offending by children, the guidelines contemplate structured consideration of whether custody is truly “unavoidable”, and if so, that the term must be the shortest commensurate with seriousness.

(c) “Forbes”

The Court noted (via the quotation from Ahmed) that the Ahmed court had expressed doubt about “Forbes” on whether and when a court may exceed the maximum that applied to the offender as a child. In OIM, that issue did not need to be decided because the Court concluded custody was not available at all on the correct age basis (save for the exceptional s.91 route, not engaged on the facts).

3.3 Legal reasoning

(1) The Court corrected the factual basis: age and “multiple incidents”

Two corrections were central:

• Age at offending: The Court found the record and evidence did not justify sentencing on the footing that the offender was 12–13 at the end of the offending. Given inconsistencies and the absence of reliable anchor points (including uncertainty about when the offender left the family home), the Court held:
  • where age materially affects sentencing powers, the court must try to resolve it carefully; and
  • if uncertainty remains, the offender must be sentenced on the basis most favourable to them—here, that the offender was no older than 11 (approaching 12) at the last offence.
• Charge scope (count 2): The sentencing judge treated count 2 as a “multiple incident” count reflecting “numerous” oral rapes. The Court held this was wrong: the complainant could specifically recall two occasions, and count 2 was a single incident count reflecting the second occasion. The offender was therefore entitled to be sentenced for the offences charged/admitted, not an expanded narrative absent clear admission.

(2) Applying Ahmed: custody was not available on the corrected age basis

Once the offender was treated as 11 (nearing 12), it was common ground that a DTO would not have been available at the time. The Court further agreed with the sentencing judge’s evaluative conclusion that this was not one of the rare cases where the court would have used s.91 “grave crime” powers to impose custody on a child so young.

That meant the Ahmed starting point was a non-custodial disposal at the time of offending—described by the Court as both the “starting point” and (absent later “good reason”) the “end point”.

(3) “Subsequent events” did not supply “good reason” for greater severity

The Solicitor General argued that later developments justified custody now: the long-term harm to KB was clearer, and the offender’s subsequent sexual offending (in 2010, leading to 2011 convictions) showed the index offences were not an isolated lapse.

The Court accepted those matters were relevant but held they did not amount to good reason to move from the non-custodial starting point to custody:

• Harm becoming clearer over time is common in historic sexual abuse cases and, on these facts, was insufficient to justify custody where it was not available at the time.
• Subsequent offending occurred when the offender was also still very young, and the Court considered it “realistic” that timely youth intervention for the index offences might have prevented later offending.
• The offender had not committed sexual offending for about 15 years, and probation assessed risk as manageable in the community.

(4) The unduly lenient test: why the reference failed

A notable practical consequence of the Court’s reasoning is that the sentencing judge’s errors did not support an “unduly lenient” outcome: once corrected, the legally appropriate approach pointed away from immediate custody altogether. The imposed sentence (18 months’ imprisonment suspended, with requirements) could not be criticised as “unduly lenient” in that corrected legal landscape.

3.4 Impact

• Reinforcement of the “favourable basis” principle where age is uncertain: Where the offender’s age at offending affects legal sentencing powers (e.g., custody availability), and uncertainty cannot be resolved, OIM emphasises that the offender should be sentenced on the most favourable basis.
• Discipline in sentencing to the indictment/admissions: Courts must not convert a single-incident count into multiple incidents without a proper basis. This is especially important in historic child abuse where recollection may be partial and charges reflect that forensic reality.
• High threshold for custody when the offender was very young: Even for very serious sexual offending, the judgment reflects the Children guideline’s strong presumption against custody for under-14s, and all the more for an 11-year-old—leaving s.91 as exceptional rather than routine.
• Limits of “subsequent events” under Ahmed: Later-discovered harm and later (but still youthful) offending will not automatically justify a more severe adult sentence where custody was unavailable at the time.
• Practice point for advocates: The Court was critical of the assistance provided at sentence. Accurate identification of (i) charge structure (single vs multiple incident), (ii) age at relevant times, and (iii) available youth disposals is essential—particularly when the sentencing judge must apply youth guidelines to an adult defendant.

4. Complex concepts simplified

• “Unduly lenient” (s.36 CJA 1988): not merely “lenient” or arguably wrong—an error must produce a sentence outside the range of sentences reasonably open to the judge.
• Ahmed approach: sentence the adult by first asking what would likely have happened if the offender had been sentenced as a child soon after the offence, given the child’s age and the legal limits on youth custody.
• DTO (Detention and Training Order): a youth custodial sentence (maximum 24 months) available only for certain ages and circumstances; it is not simply the youth equivalent of an adult prison term.
• “Persistent offender” in youth sentencing: not defined in statute; the Children guideline explains it generally involves prior contacts/findings, though a short series of comparable offences may sometimes suffice (but custody remains a last resort).
• s.91 “grave crimes” detention: an exceptional power (as it then existed) allowing custody for very serious offences committed by children, but not to be treated as a default route around the normal custody restrictions for very young offenders.
• Single incident vs multiple incident count: a “multiple incident” count alleges repeated offending within a period; a single incident count alleges one occasion. Sentencing must match the admitted charge.

5. Conclusion

R v OIM is a significant illustration of the practical force of R v Ahmed [2023] EWCA Crim 281 in historic sexual cases where the offender was a very young child at the time of offending but is sentenced as an adult. The Court’s key messages are that (i) uncertainty over age must be resolved in the offender’s favour where it affects sentencing powers, (ii) sentencing must track the counts admitted and not an expanded narrative, and (iii) where custody was not legally available at the time (and s.91 is not engaged), “subsequent events” will rarely justify an adult custodial sentence. On that basis, the Solicitor General’s attempt to characterise the suspended sentence as unduly lenient failed.