H418/01 - Consent and evaluation

Genuine consent and its scope

Consent means genuine agreement to the relevant conduct. It can be expressed through words or inferred from conduct, but silence, submission or fear must not automatically be treated as agreement.

In common assault and battery, valid consent can make conduct lawful. Everyday social contact often falls within implied consent: a tap on a shoulder to attract attention or ordinary contact in a crowded train differs from a deliberate hostile shove. Agreement is limited to the contact and circumstances accepted. Consenting to a medical examination does not authorise an unrelated attack; joining a sport does not authorise every possible use of violence.

The person must have sufficient capacity and understanding to agree to what is done. Age, intoxication, illness or pressure can affect this, but no label alone answers the question. A person unconscious at the time cannot then communicate a new choice. Fraud about the nature or quality of the act can undermine apparent consent; not every lie about a collateral matter necessarily does so. The legal effect depends on the particular conduct and offence.

Original comparison: a person holds out an arm for an agreed vaccination after understanding the procedure. That supports actual consent within its scope. A person holds out an arm because another falsely describes a harmful injection as a harmless skin measurement: the deception goes to what is being agreed to. The facts should be examined rather than treating the words “I agreed” as decisive.

Once consent is a live issue for an offence where it is legally available, the prosecution must establish the absence of the necessary consent or defeat the defence to the criminal standard. Separate two questions: was agreement genuine, and can the law recognise it for this level and type of harm? Even perfectly informed agreement may fail the second question.

The boundary at bodily harm

Consent is generally available for common assault and battery, but causing or intending actual bodily harm or more serious injury requires a legally recognised good reason or exception. The harm threshold matters, rather than whether the activity is private or the participant later complains.

R v Brown (1993) concerned consensual sadomasochistic conduct resulting in actual bodily harm and wounds. By a majority, the House of Lords held that consent did not provide a defence under sections 47 and 20 of the Offences Against the Person Act 1861 in those circumstances. Consent is therefore not a universal defence to injury. Attorney-General’s Reference (No 6 of 1980) similarly rejects consent to a fight causing or intending actual bodily harm outside properly conducted sport, whether the fight is public or private.

The rule is subject to accepted categories, such as proper medical treatment, properly conducted sports and lawful tattooing or piercing. An injury during one of these activities does not automatically establish crime; equally, giving an activity a permitted label does not authorise violence outside its limits.

Section 71 of the Domestic Abuse Act 2021 expressly rules out consent to the infliction of actual bodily harm, wounding or grievous bodily harm for sexual gratification as a defence to the relevant sections 18, 20 or 47 offences. It applies beyond domestic relationships and regardless of whose gratification is intended. It preserves a defined sexually transmitted infection qualification and other rules concerning consent in other circumstances. It is an established statutory rule, not simply a future reform.

Original application: two adults agree to a private fight which causes actual bodily harm. Privacy and their genuine agreement do not create the sporting exception. If they instead participate in a properly organised boxing match, the activity and its limits require a separate analysis. Never assume that “adults consented” finishes the defence.

Recognised activities and their limits

The exceptions recognise that some valuable or accepted activities involve injury, but their legal boundaries must be applied rather than memorised as a list of permissions.

Proper medical treatment is distinct from an unqualified person performing serious procedures for no medical reason. Valid consent, a lawful basis for treatment and the relevant professional setting matter. Tattooing and piercing are accepted activities subject to regulation and separate statutory limits; ordinary consent cannot override a statutory prohibition.

In R v Wilson (1996), branding at the wife’s request was treated as comparable to tattooing or personal adornment and a consent defence was allowed to the actual-bodily-harm charge. This is a limited analogy, not a rule that marriage or privacy excuses serious violence. Section 71 now expressly limits consent to harm inflicted for sexual gratification.

In R v BM (2018), a tattooist and piercer carried out procedures including removing an ear and splitting a tongue. Consent did not provide a defence. The Court of Appeal refused to create a new exception for these serious body modifications by extending tattooing and piercing. It stressed the major medical risks and absence of the safeguards of proper medical treatment. The court accepted that entirely new exceptions involve disputed policy choices better addressed by Parliament.

In sport, participants accept ordinary contact and some risk of injury, including mistakes during play. A breach of a sport’s rules is relevant but does not automatically make every foul a criminal assault. In R v Barnes (2004), a football-tackle conviction was quashed; criminal proceedings require conduct sufficiently grave to be criminal, considering matters such as the sport, level, nature of the act, force, injury risk and the participant’s state of mind. Deliberate off-the-ball revenge is much less likely to be within accepted sporting contact than a mistimed tackle during play.

Genuine rough horseplay is another recognised area in which consent, or an honest belief in it, can matter: R v Jones (1986) concerned boys being thrown into the air. It does not excuse bullying disguised as play. Examine the participants’ actual agreement, the defendant’s honest belief and the type of activity, rather than treating a serious accidental outcome as conclusive either way.