This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Learn how appeals against sentencing guideline application are handled in England and Wales. This comprehensive guide explains the appellate process for contested sentences, how to challenge guideline application, courts involved, procedural steps and practical considerations for defendants and practitioners.

In the criminal justice system of England and Wales, sentencing guidelines play a central role in shaping the range and type of punishment a court can impose for a particular offence. These guidelines, issued by the Sentencing Council, are intended to promote consistency, fairness and transparency in sentencing, and courts must follow them unless it would be contrary to the interests of justice to do so.
When a defendant believes that a sentence was imposed without proper application of the relevant sentencing guidelines - for example because the court mis‑categorised the offence or misunderstood the harm or culpability - there are legal procedures to challenge that sentence through appeal. This article explains how appeals against sentencing guidelines applied in a case are heard, the courts involved, the legal framework, timelines, grounds for appeal and practical steps for parties involved in criminal proceedings.
What Are Sentencing Guidelines?
Sentencing guidelines are documents produced by the Sentencing Council for England and Wales to guide judges and magistrates on the appropriate sentencing range for different types of offences and offender characteristics. They encapsulate factors that should be taken into account - such as culpability, harm caused, aggravating and mitigating factors - and provide structured ranges of punishment, whether custodial (prison), community sentences or fines.
By statute, courts must follow relevant sentencing guidelines unless doing so would be contrary to the interests of justice. If a court departs from a guideline range, it must provide clear reasons for the departure.
When Might Sentencing Guidelines Be Challenged on Appeal?
A defendant may argue that a sentencing guideline was mis‑applied by a sentencing court, resulting in an inappropriate sentence. Examples include claims that:
- the judge selected an incorrect starting point or range in the guideline;
- the court mis‑categorised the offence when applying the guideline; or
- the guideline was applied without proper regard to mitigating or aggravating factors.
Such challenges do not automatically mean the sentence was unlawful, but they may support an appeal if they show the sentence imposed was manifestly excessive or wrong in principle.
Legal Framework for Appeals Against Sentencing Decisions
Appeals against sentence in criminal cases are primarily governed by:
- the Criminal Appeal Act 1968, which provides the statutory basis for appealing sentences to the Court of Appeal;
- the Criminal Procedure Rules (Part 39) setting out procedural requirements; and
- common‑law principles developed in case law. Decisions of the Court of Appeal also help shape how guidelines are interpreted in practice.
There is also a separate statutory scheme under the Criminal Justice Act 1988 for unduly lenient sentence referrals by the Attorney General, where a sentence falls outside the range judges could reasonably consider appropriate.
Routes for Challenging Sentencing Guideline Application
1. Appeal by the Defendant
Magistrates' Court Sentences
If a defendant is sentenced in a magistrates' court, they have a statutory right to appeal to the Crown Court against sentence. This appeal is a full rehearing of the sentencing exercise. The Crown Court may confirm, vary or even increase the sentence within the statutory limits available for the offence.
Grounds for appeal can include arguments that sentencing guidelines were mis‑applied or that the overall sentence was manifestly excessive. A sentence is manifestly excessive when it falls outside the proper range considering all relevant factors.
Crown Court Sentences
For sentences imposed in the Crown Court, defendants must apply for permission to appeal to the Court of Appeal (Criminal Division) under section 9 of the Criminal Appeal Act 1968. An application for permission (often referred to as “leave to appeal”) must usually be lodged within 28 days of sentencing.
The Court of Appeal will first consider the written application, and if it considers there is sufficient merit, it will grant permission for a full appeal hearing. At the full hearing, the court can examine whether the guideline was applied correctly and whether any error led to a sentence that was wrong in principle or manifestly excessive.
2. Attorney General's Reference for Unduly Lenient Sentence
Separately, the Attorney General can refer a sentence to the Court of Appeal on the grounds that it is unduly lenient. This scheme allows members of the public or the Crown Prosecution Service to request a review when they believe a sentence falls below what would be appropriate given the seriousness of the offence.
The Court of Appeal may increase the sentence if it determines the original sentence “falls outside the range of sentences which the judge, applying his mind to all the relevant factors could reasonably consider appropriate”.
The Appeal Procedure: Step by Step
1. Lodging the Appeal
- A defendant must serve the appropriate notice and grounds of appeal - usually by lodging Form NG at the Court of Appeal registry within 28 days of sentencing in Crown Court cases.
- Grounds should clearly articulate why the sentence is contested, including reference to the relevant guideline and how it was, in the appellant's view, mis‑applied.
2. Permission (Leave Stage)
- For Crown Court sentences, a single judge of the Court of Appeal will consider the application for permission.
- If permission is refused, the applicant may renew it before the full court within a set period (often 14 days).
- If permission is granted, the case proceeds to a full appeal hearing.
3. Full Appeal Hearing
- The full Court of Appeal will hear legal argument and review whether the sentencing guideline was properly applied and whether any error amounts to a sentence that is manifestly excessive or wrong in principle.
- The court will consider the applicable guideline range, the sentencing judge's reasons, and any relevant case law.
4. Outcome
- If the appeal succeeds, the Court of Appeal may reduce the sentence, substitute a different sentence, or, in unduly lenient referrals, increase the sentence.
- If the appeal fails, the original sentence stands.
Time Limits and Practical Considerations
- Time Limits: The 28‑day period for applications to appeal against sentence is strict in most cases; extensions are only granted in exceptional circumstances.
- Need for Reasons: Sentencing courts are required to record reasons for departures from sentencing guidelines. Failure to do so can itself be a basis for appeal.
- Role of Legal Representation: Appeals require careful drafting of grounds and legal argument. Experienced solicitors or counsel can identify applicable guidelines and frame grounds effectively.
Common Questions
Can a guideline itself be appealed?
No. Appeals challenge the application of guidelines in a particular case, not the guideline document itself. The Sentencing Council reviews and updates guidelines separately.
What happens if guidelines change after sentencing?
Generally, appeals are assessed based on the guidelines in force at the time of sentencing. However, in rare cases the Court of Appeal may consider subsequent authoritative interpretations or developments in law.
Do victims have a role in sentencing guideline appeals?
Victims are not direct parties to sentencing appeals but may be informed of proceedings and outcomes. Their interests may be represented by the prosecution where appropriate.
Key Takeaways
Appeals against how sentencing guidelines are applied form an important part of the criminal justice system in England and Wales. Where a defendant believes that a sentence was improperly calculated or applied outside the relevant guideline range, there are structured routes for challenge: from the Crown Court (for sentences from magistrates' courts) and to the Court of Appeal (for Crown Court sentences). The appeal process involves serving notice in a timely manner, seeking permission where required, and presenting legal grounds that demonstrate error in guideline application or that the sentence is manifestly excessive or wrong in principle. Separately, the Attorney General's unduly lenient sentence scheme provides a mechanism to challenge sentences perceived as inappropriately low. Understanding these procedures ensures that sentencing decisions can be scrutinised effectively and that justice is upheld through transparent appellate review.