9.5 Mandatory & Minimum Custodial Sentences
Key Takeaways
- Murder carries a sentence fixed by law — life imprisonment for those aged 21 or over, custody for life at 18 to 20 and detention at His Majesty's Pleasure under 18 — and section 321 of the Sentencing Code then requires a minimum term order or, in qualifying cases, a whole life order.
- Schedule 21 provides adult starting points of a whole life order, 30 years, 25 years for a murder where a knife or other weapon was taken to the scene, and 15 years in any other case, with a separate table for offenders under 18.
- Section 313 requires a minimum of 7 years for a third Class A drug trafficking offence and section 314 a minimum of 3 years for a third domestic burglary, unless there are particular circumstances making it unjust.
- Section 315 imposes a minimum of 6 months for a repeat offence involving an offensive weapon or bladed article by an adult, unless there are exceptional circumstances relating to the offence or the offender.
- Section 73(3) of the Sentencing Code caps the guilty plea reduction for the minimum terms in sections 312 to 315, so the court may not go below 80 per cent of the minimum.
9.5 Mandatory & Minimum Custodial Sentences
Most sentencing is a structured discretion. A small but heavily examined group of sentences is not: Parliament has fixed either the sentence itself or a floor beneath which the court may not go except in defined circumstances.
1. Murder: the mandatory life sentence
The sentence for murder is fixed by law, and the applicable provision depends on the offender's age:
| Age at conviction | Sentence | Source |
|---|---|---|
| 21 or over | Imprisonment for life | Murder (Abolition of Death Penalty) Act 1965, s.1(1) |
| 18 to 20 | Custody for life | Sentencing Code, s.275 |
| Under 18 | Detention at His Majesty's Pleasure | Sentencing Code, s.259 |
The life sentence itself is not the judge's decision. What the judge decides is the minimum term. Section 321 of the Sentencing Code requires a court passing a life sentence to make either a minimum term order — specifying the part of the sentence that must be served before the early release provisions apply — or, in a qualifying case, a whole life order, so that those provisions never apply. A whole life order is available where the offender was 21 or over at the time of the offence, and (for offences committed after s.126 of the Police, Crime, Sentencing and Courts Act 2022 came into force) where the offender was 18 to 20, but in the latter case only where the seriousness is exceptionally high even by the standard of cases that would normally attract a whole life order for an adult.
Release on a minimum term order is never automatic: the offender becomes eligible to be considered by the Parole Board once the minimum term has been served, and a life prisoner who is released remains on licence for life and liable to recall.
Schedule 21 starting points
Schedule 21 to the Sentencing Code sets starting points for the minimum term. For offenders aged 18 or over at the time of the offence:
| Starting point | Typical category |
|---|---|
| Whole life order | Murders of exceptionally high seriousness — for example the murder of two or more persons involving a substantial degree of premeditation, abduction or sexual or sadistic conduct; the murder of a child involving abduction or sexual or sadistic motivation; a murder done to advance a political, religious, racial or ideological cause; a murder by an offender previously convicted of murder |
| 30 years | Murders of particularly high seriousness — the murder of a police or prison officer in the course of duty, a murder involving a firearm or explosive, a murder for gain, a murder to obstruct the course of justice, a sexually or sadistically motivated murder, the murder of two or more persons, a racially or religiously aggravated murder |
| 25 years | Where the offender took a knife or other weapon to the scene intending to commit an offence or to have it available as a weapon, and used it in committing the murder |
| 15 years | Any other case |
A separate table applies to offenders under 18 at the time of the offence, with starting points that vary by age and by the seriousness category into which the murder falls.
The starting point is only that: the judge then adjusts for aggravating and mitigating factors — significant planning, vulnerability of the victim, mental disorder, provocation short of a defence, an intention to cause serious harm rather than to kill — and may move substantially from the starting point in either direction. Time on remand is then deducted.
Guilty plea. The Definitive Guideline treats murder separately: the maximum reduction to the minimum term is one sixth, and in no case more than five years.
2. Statutory minimum sentences
| Provision | Offence | Minimum | Escape route |
|---|---|---|---|
| s.311 | Certain firearms offences (adult) | 5 years (3 years for 16–17-year-olds) | "Exceptional circumstances which relate to the offence or to the offender and justify not doing so" |
| s.312 | Threatening with a weapon or corrosive substance / bladed article | 6 months (adult); 4-month DTO for 16–17 | Exceptional circumstances |
| s.313 | Third Class A drug trafficking offence | 7 years | "Particular circumstances which relate to any of the offences or to the offender and would make it unjust to do so in all the circumstances" |
| s.314 | Third domestic burglary | 3 years | Particular circumstances / unjust |
| s.315 | Repeat offence involving an offensive weapon or bladed article | 6 months (adult); 4-month DTO for 16–17 | Exceptional circumstances |
Two structural points are examined repeatedly:
- The two tests are different. Sections 311, 312 and 315 use "exceptional circumstances", a deliberately stringent formula. Sections 313 and 314 use "particular circumstances … would make it unjust", which is a lower threshold and requires the court to look at the whole picture, including the antiquity and gravity of the qualifying offences.
- The plea reduction is capped. Section 73(3) of the Sentencing Code provides that for the minimum sentence requirements in ss.312 to 315, the requirement does not prevent the court from imposing a sentence which is not less than 80 per cent of the minimum. So a defendant facing the 7-year minimum under s.313 who pleads guilty at the first stage receives at most a reduction to 5 years 7 months — not the ordinary one third.
Where s.313 or s.314 applies to an offence that would otherwise be either way, the offence becomes triable only on indictment. That is a direct allocation consequence, and it is a favourite SBA point: a third domestic burglary must be sent to the Crown Court.
Qualifying conditions. For ss.313 to 315 the previous convictions must have been for qualifying offences committed after conviction for the earlier one — the "three strikes" sequence must be genuine, not concurrent. Counsel must check the sequence of conviction dates as well as offence dates.
3. Life sentences other than for murder
Beyond the mandatory life sentence for murder, the Sentencing Code provides for:
- A life sentence for a second listed offence (s.283) — where the offender is convicted of a listed offence, the offence is serious enough for a 10-year sentence, and the offender has a previous conviction for a listed offence for which a relevant sentence was imposed, life is required unless it would be unjust in all the circumstances;
- A discretionary life sentence where the offence carries life and the offender's culpability and dangerousness make it appropriate;
- Extended determinate sentences and sentences for offenders of particular concern under the dangerous offender provisions.
Exam traps in this section
- The judge fixes the minimum term, not the length of the life sentence; release is by the Parole Board and licence is for life.
- The 25-year Schedule 21 starting point requires the weapon to have been taken to the scene, not merely used there.
- "Exceptional circumstances" (ss.311, 312, 315) is a higher bar than "unjust in all the circumstances" (ss.313, 314).
- 80 per cent is the plea floor for ss.312–315; for murder the cap is one sixth and never more than five years.
- A third domestic burglary to which s.314 applies is indictable only.
An adult with two previous convictions for domestic burglary, each committed after conviction for the preceding one, is charged with a third domestic burglary. He wishes to be tried in the magistrates' court. Advise on venue and sentence.
A defendant is convicted of murder. He took a kitchen knife from his own home and carried it to the victim's address, where he used it to kill. He is 24. What is the Schedule 21 starting point for the minimum term?
A judge sentencing an adult for a second offence of possessing a bladed article in a public place under section 315 of the Sentencing Code wishes to impose a community order. What must she find?