Skip to main content
  • Home /
  • Unlawful act manslaughter
Crown Court

Unlawful act manslaughter

Common law

Effective from 01 November 2018

Triable only on indictment
Maximum: Life imprisonment

Offence range: 1 – 24 years’ custody

This is a Schedule 19 offence for the purposes of sections 274 and 285 (required life sentence for offence carrying life sentence) of the Sentencing Code.

For offences committed on or after 3 December 2012, this is an offence listed in Part 1 of Schedule 15 for the purposes of sections 273 and 283 (life sentence for second listed offence) of the Sentencing Code.

This is a specified offence for the purposes of sections 266 and 279 (extended sentence for certain violent, sexual or terrorism offences) of the Sentencing Code.

For offences committed on or after 28 June 2022, if the offence was committed against an emergency worker acting in the exercise of functions as such a worker, the court must impose a life sentence unless the court is of the opinion that there are exceptional circumstances which (a) relate to the offence or the offender, and (b) justify not doing so (sections 274A and 285A of the Sentencing Code). See step 3

The type of manslaughter (and thereby the appropriate guideline) should have been identified prior to sentence. If there is any dispute or uncertainty about the type of manslaughter that applies the judge should give clear reasons for the basis of sentence.

User guide for this offence


Guideline users should be aware that the Equal Treatment Bench Book covers important aspects of fair treatment and disparity of outcomes for different groups in the criminal justice system. It provides guidance which sentencers are encouraged to take into account wherever applicable, to ensure that there is fairness for all involved in court proceedings.

Step 1 – Determining the offence category

Culpability

The characteristics set out below are indications of the level of culpability that may attach to the offender’s conduct; the court should weigh those factors in order to decide which category most resembles the offender’s case in the context of the circumstances of the offence. The court should avoid an overly mechanistic application of these factors.

A - Very high Culpability

Very high culpability may be indicated by:

  • the extreme character of one or more culpability B factors and /or
  • a combination of culpability B factors

B - Factors indicating high culpability

  • Death was caused in the course of an unlawful act which involved an intention by the offender to cause harm falling just short of GBH
  • Death was caused in the course of an unlawful act which carried a high risk of death or GBH which was or ought to have been obvious to the offender
  • Death was caused in the course of committing or escaping from a serious offence in which the offender played more than a minor role
  • Concealment, destruction, defilement or dismemberment of the body (where not separately charged)

C - Factors indicating medium culpability

Cases falling between high and lower including but not limited to

  • where death was caused in the course of an unlawful act which involved an intention by the offender to cause harm (or recklessness as to whether harm would be caused) that falls between high and lower culpability
  • where death was caused in the course of committing or escaping from a less serious offence but in which the offender played more than a minor role

D - Factors indicating lower culpability

Death was caused in the course of an unlawful act

  • which was in defence of self or other(s) (where not amounting to a defence) OR
  • where there was no intention by the offender to cause any harm and no obvious risk of anything more than minor harm OR
  • in which the offender played a minor role
  • The offender’s responsibility was substantially reduced by mental disorder, learning disability or lack of maturity

Harm

For all cases of manslaughter the harm caused will inevitably be of the utmost seriousness. The loss of life is taken into account in the sentencing levels at step two.

Step 2 – Starting point and category range

Having determined the category at step one, the court should use the corresponding starting point to reach a sentence within the category range in the table below. The starting point applies to all offenders irrespective of plea or previous convictions.

An adjustment from the starting point, upwards or downwards, may be necessary to reflect particular features of culpability  (for example, the presence of multiple factors within one category, the presence of factors from more than one category (where not already taken into account at step 1), or where a case falls close to a borderline between categories).

Culpability
A B C D
Starting point
18 years’ custody
Starting point
12 years’ custody
Starting point
6 years’ custody
Starting point
2 years’ custody
Category range
11 – 24 years’ custody
Category range
8 – 16 years’ custody
Category range
3 – 9 years’ custody
Category range
1 – 4 years’ custody

Note: The table is for a single offence of manslaughter resulting in a single fatality. Where another offence or offences arise out of the same incident or facts, concurrent sentences reflecting the overall criminality of offending will ordinarily be appropriate: please refer to the Totality guideline and step 7 of this guideline.

The tables below contain a non-exhaustive list of additional factual elements providing the context of the offence and factors relating to the offender. Identify whether any combination of these, or other relevant factors, should result in a further upward or downward adjustment. In some cases, having considered these factors, it may be appropriate to move outside the identified category range.

Care should be taken to avoid double counting factors already taken into account in assessing culpability

Factors increasing seriousness

Statutory aggravating factors:

  • having regard to a) the nature of the offence to which the conviction relates and its relevance to the current offence; and b) the time that has elapsed since the conviction (See step 6 for a consideration of dangerousness)
  • Offence was committed against an
    NOTE: For offences committed on or after 28 June 2022, if the offence was committed against an emergency worker acting in the exercise of functions as such a worker, the court must impose a life sentence unless the court is of the opinion that there are exceptional circumstances which (a) relate to the offence or the offender, and (b) justify not doing so (sections 274A and 285A of the Sentencing Code). See step 3

Other aggravating factors:

  • History of violence or abuse towards victim by offender (which may include coercive or controlling behaviour)
  • Use of strangulation, suffocation or asphyxiation
  • Involvement of other(s) through coercion, intimidation or exploitation
  • Significant mental or physical suffering caused to the deceased
  • Persistence of violence

Factors reducing seriousness or reflecting personal mitigation

  • Attempts to assist the victim
  • History of significant violence or abuse towards the offender by the victim (which may include coercive or controlling behaviour)

Step 3 – Required sentence and exceptional circumstances

The following paragraphs apply to adult offenders – there is a separate dropdown section for those aged under 18 at the date of conviction below

Required sentence

  1. Where the offence was committed against an emergency worker acting in the exercise of functions as such a worker, the court must impose a life sentence unless the court is of the opinion that there are exceptional circumstances which (a) relate to the offence or the offender, and (b) justify not doing so (sections 274A and 285A of the Sentencing Code).

Applicability

  1. The required sentence provisions apply when a person is convicted of unlawful act manslaughter committed on or after 28 June 2022, the offender was aged 16 or over at the offence date and the offence was committed against an emergency worker acting in the exercise of functions as such a worker.
  2. The circumstances in which an offence is to be taken as committed against a person acting in the exercise of their functions as an emergency worker include circumstances where the offence takes place at a time when the person is not at work but is carrying out functions which, if done in work time, would have been in the exercise of their functions as an emergency worker.
  3. An emergency worker has the meaning given by section 68 of the Sentencing Code.
  4. Where the required sentence provisions apply a guilty plea reduction applies in the normal way (see step 5 – Reduction for guilty pleas).
  5. Where the required sentence provisions apply and a life sentence is imposed, the notional determinate sentence should be used as the basis for the setting of a minimum term to be served.
  6. Where the required sentence provisions apply, this should be stated expressly.

Exceptional circumstances

  1. In considering whether there are exceptional circumstances that would justify not imposing the statutory minimum sentence, the court must have regard to:
  • the particular circumstances of the offence and
  • the particular circumstances of the offender

either of which may give rise to exceptional circumstances.

  1. Where the factual circumstances are disputed, the procedure should follow that of a Newton hearing: see Criminal Practice Directions 9.3.3 Sentencing.It is for the offender to establish that the exceptional circumstances exist..
  2. Where the issue of exceptional circumstances has been raised the court should give a clear explanation as to why those circumstances have or have not been found.

Principles

  1. Circumstances are exceptional if the imposition of the required sentence would result in an arbitrary and disproportionate sentence.
  2. The court should look at all of the circumstances of the case taken together, including circumstances personal to the offender. A single striking factor may amount to exceptional circumstances, or it may be the collective impact of all of the relevant circumstances.

Where exceptional circumstances are found

  1. If there are exceptional circumstances that justify not imposing the required sentence then the court should impose the sentence arrived at by normal application of this guideline.

Step 4 – Consider any factors which indicate a reduction for assistance to the prosecution

The court should take into account section 74 of the Sentencing Code (reduction in sentence for assistance to prosecution) and any other rule of law by virtue of which an offender may receive a discounted sentence in consequence of assistance given (or offered) to the prosecutor or investigator.

Step 5 – Reduction for guilty pleas

The court should take account of any potential reduction for a guilty plea in accordance with section 73 of the Sentencing Code and the Reduction in Sentence for a Guilty Plea guideline.

Step 6 – Dangerousness

The court should consider: 1) whether having regard to the criteria contained in Chapter 6 of Part 10 of the Sentencing Code it would be appropriate to impose a life sentence (sections 274 and 285); 2) whether having regard to sections 273 and 283 of the Sentencing Code it would be appropriate to impose a life sentence. 3) whether having regard to the criteria contained in Chapter 6 of Part 10 of the Sentencing Code it would be appropriate to impose an extended sentence (sections 266 and 279) When sentencing offenders to a life sentence under these provisions, the notional determinate sentence should be used as the basis for the setting of a minimum term.

Step 7 – Totality principle

If sentencing an offender for more than one offence, or where the offender is already serving a sentence, consider whether the total sentence is just and proportionate to the overall offending behaviour in accordance with the Totality guideline.

Step 8 – Compensation and ancillary orders

In all cases the court should consider whether to make compensation and/or other ancillary orders.

Step 9 – Reasons

Section 52 of the Sentencing Code imposes a duty to give reasons for, and explain the effect of, the sentence.

Step 10 – Consideration for time spent on bail (tagged curfew)

The court must consider whether to give credit for time spent on bail in accordance with section 240A of the Criminal Justice Act 2003 and section 325 of the Sentencing Code.

Give feedback about this page

Please tell us if there is an issue with this guideline to do with the accuracy of the content, how easy the guideline is to understand and apply, or accessibility/broken links.