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In most sexual offence cases, nobody disputes that the two people met, or that something happened between them. What is disputed is consent, and whether any belief in consent was reasonable. That is where these cases are won and lost, and it is a far narrower question than the public conversation around them suggests.
This is a plain-English account of how consent is defined in law, how the statutory presumptions work, what “reasonable belief” actually requires of an individual, and why the material capable of answering those questions is usually disappearing while nobody is collecting it.
A sexual offence allegation rarely arrives as a dispute about events. Both accounts frequently agree on where the parties were, that they had been in contact, and that some physical contact occurred. The dispute is about consent, and about what each person understood at the time.
That has a practical consequence that is routinely missed. Because the disagreement is narrow, the material capable of resolving it is also narrow, and it is almost always contemporaneous: messages before and after, the sequence of the evening, who said what to whom in the following days, movement and location data, and the accounts of people who saw either party that night. Those are exactly the things that decay fastest. Phones are replaced, accounts are deleted, and memories of an ordinary evening blur within weeks.
Where that work succeeds and the case ends without a charge, the outcome is a no further action decision, which is its own subject and carries consequences people rarely expect. This is why we say so often that these cases are decided long before anyone reaches a courtroom. The evidence that answers a consent question is available now and frequently gone later, which is the entire argument for engaging at the pre-charge stage rather than waiting.
Consent is defined in section 74 of the Sexual Offences Act 2003: a person consents if they agree by choice, and have the freedom and capacity to make that choice.
Three words carry that definition, and each does distinct work:
Consent is also not global. Consent to one act is not consent to another, and consent can be withdrawn at any point during sexual intimacy. An allegation frequently turns on a change during an encounter rather than on the encounter as a whole.
Consent is not a free-standing topic. It is an element of specific offences, and it is worth being precise about which, because the same analysis runs through all of them.
Each of these has the same two-part structure: an absence of consent, and an absence of reasonable belief in consent. A prosecution that proves the first but not the second has not proved the offence.
So although rape and sexual assault sit at different points on the scale of seriousness, the consent analysis is identical in both. Whether the relevant act is penetration or sexual touching changes the offence charged and the sentence risked; it does not change what the Crown has to prove about sexual consent. That is why a defence built on the consent question works across the whole group of offences rather than being tied to one of them, and why the same preparation serves a case involving any sexual activity the Act covers.
For some offences, consent is legally irrelevant. Where the complainant is a child under 13, consent is not a defence to the corresponding offence, whatever was said or understood at the time. The offences involving a child under 13 are drafted so that the question does not arise, and anyone approaching such a case on the basis that consent is in issue has misread the Act. Anyone under the age of 16 is incapable of sexual consent. Therefore, any sexual activity in law is impossible in such circumstances.
The Act supplements the definition with two sets of presumptions, and the difference between them matters enormously.
In defined circumstances, consent is presumed absent unless sufficient evidence is raised to put it in issue. Those circumstances are defined, and they are narrower than people assume:
Where the prosecution proves the defendant knew those circumstances existed, the presumption bites. Note the last of these carefully: it concerns drugs or alcohol administered to the complainant, not drink taken voluntarily. Voluntary intoxication is dealt with under capacity in section 74, not by presumption.
These are rebuttable. Where one applies, the practical effect is that the defence must raise sufficient evidence for consent and reasonable belief to remain live issues. It shifts what has to be shown, and when.
A much narrower category, and unlike section 75 these cannot be rebutted at all. They apply where the defendant deceived the complainant as to the nature or purpose of the act, or impersonated a person known personally to the complainant. Where a conclusive presumption applies, consent is not in issue, and the argument moves elsewhere entirely.
The scope of section 76 is deliberately tight, and the courts have kept it that way, precisely because a conclusive presumption removes a question from the jury.
Consent can be given on a condition, and the courts have accepted that where the condition is breached, it may not hold. The clearest reported example concerns condom use: agreement to protected activity is not automatically agreement to unprotected sexual acts. The analysis is done under section 74, by asking what was actually agreed to, rather than under the section 76 conclusive presumptions.
Deception cases sit on the same boundary. Deception as to gender has been treated as capable of removing consent, again under section 74 rather than section 76, because the courts have kept section 76 narrow. The distinction matters in practice: a case argued under section 76 is over, while a case argued under section 74 remains a question for the jury on all the circumstances.
Nor does a relationship supply consent in advance. Being married, or in an established relationship, is not blanket consent to any sexual act at any time. Consent is assessed at the time of the relevant sexual act, in the circumstances that existed at the time.
Public discussion of these cases treats them as though the only question is what the complainant consented to. Legally, that is only half of it.
For the principal offences, the prosecution must prove both that the complainant did not consent and that the defendant did not reasonably believe the victim consented. It is not enough that he believed it. What he believed must also have been reasonable in all circumstances.
Whether consent is reasonable is determined having regard to all the circumstances, including any steps the defendant took to ascertain whether the complainant consented. That last clause is the one that decides cases. It converts an abstract question into an evidential one: what did this person actually do, in the moment, to establish that the other person was consenting?
Two examples make the point. A suspect or a defendant who says he assumed consent because nothing was said, and who took no specific steps to ensure consent, is not helped by the sincerity of that assumption; the question is whether what he believed was reasonable, and an assumption resting on nothing is difficult to defend. A defendant who can show what was asked, what was said in reply, and how the position was checked as circumstances changed, is arguing on the statutory ground rather than against it.
This matters in both directions, and we should be straightforward about that. It is why a defendant who did nothing to check cannot rely on having believed it anyway. It is equally why a defendant who did check, and can show it, has a real answer to the allegation, and why the contemporaneous record is so valuable. Though I should add, contemporaneous records do not always exist, especially in historical sexual abuse cases.
It is worth separating two things that get conflated. The Crown does not have to show that a defendant knew there was no consent. It has to prove that he did not reasonably believe there was consent, at the time. A defendant who genuinely believed the complainant was consenting can still be convicted of rape or sexual assault, if what he believed was not reasonable on the facts. Equally, a defendant who believed consent was present, and whose belief is supported by what was said and done, has a defence that engages the statute directly.
Several factors bear on whether a belief was reasonable: what was said, what was done, how long the parties had known each other, whether anything in the circumstances should have prompted a check, and whether one was made. None is decisive on its own. Together they are what a jury is asked to weigh.
Two examples, both common. In the first, a complainant says nothing and does not resist, and the defendant believed silence meant agreement. Submission is not consent, and a belief resting on nothing is difficult to call reasonable. In the second example, both people had been drinking alcohol; the complainant later says that they were too affected to agree to the sexual act, and the defendant says he believed nothing in their presentation suggested that at the time. The second is not resolved by who sounds more credible; it is resolved by evidence of how much was consumed, over how long, and how the person appeared to everyone else involved that evening.
Nor does the analysis change because no violence was used. Sexual activity can be non-consensual without anyone being forced, and the absence of injury proves nothing either way. A prosecution for sexual assault or any other sexual offence does not require force to be shown, and a defence does not fail for want of it.
Very little of the real work in a consent case happens in a courtroom. Most of it happens early, and quietly.
Where an allegation concerns events years ago, all of this is harder and more urgent at once, which is the subject of our piece on historic sexual offence allegations.
We act for people accused of these offences, and we do that work carefully and without apology, because the presumption of innocence is not a technicality and an allegation is not a finding.
That position does not require diminishing anyone. Sexual offences are serious, complainants and victims are entitled to be taken seriously, and nothing in this article suggests otherwise. What it does require is insisting that the law be applied as written: that consent and reasonable belief are proved rather than assumed, that presumptions are applied within their proper limits, and that a person facing an allegation of this kind gets a defence built on evidence rather than on atmosphere, and public/political agendas.
That is a harder position to hold publicly than it should be. It is also the whole point of having a defence bar.
We act for individuals across England and Wales facing allegations of rape and sexual assault, and the overwhelming majority of our value is delivered before a charging decision is taken.
In practice, that means moving immediately on the contemporaneous record while it still exists, establishing the steps taken to ascertain consent, testing whether any statutory presumption is being applied more widely than the section allows, and putting that material in front of the decision-maker in writing rather than waiting to see what happens. Where an order such as a Sexual Harm Prevention Order is being sought alongside or after proceedings, we deal with that as part of the same strategy. Allegations of rape and sexual assault are prosecuted on the consent question above all others, and that is where we concentrate. This is sensitive work, conducted with discretion, and it forms the core of our sexual offences defence practice within our wider criminal defence work.
Consent cases feel like one person’s word against another’s. In practice, they are decided on the record around that word, and that record is available now.
One of the questions we are most frequently asked is whether a delay in reporting an allegation to the police affects a complainant’s credibility.
The short answer is: not necessarily. People report allegations at different times and for different reasons. An allegation made immediately can be untrue, just as an allegation reported months or even years later can be entirely truthful. Delay, by itself, does not determine whether an allegation is true or false.
We offer confidential consultations, in person at our London offices or remotely by secure call. Initial enquiries are handled discreetly and quickly.
If an allegation has been made and no decision has yet been taken, that is the moment when the evidence still exists and representations carry the most weight. Speak to our team today.
Section 74 of the Sexual Offences Act 2003 provides that a person consents if they agree by choice, and have the freedom and capacity to make that choice. Submission is not the same as agreement, and consent to one act is not consent to another.
For the principal sexual offences, the prosecution must prove both that a) the complainant did not consent and b) that the defendant did not reasonably believe they did. Whether a belief was reasonable is judged on all the circumstances, including any steps the defendant took to ascertain consent.
The law does not say that drinking removes the ability to consent. It asks whether the person retained the capacity to choose at the relevant time. That is a question of degree, decided on evidence about the amount and timing of what was consumed and how the person presented.
Section 75 creates evidential presumptions in defined circumstances, such as violence, unlawful detention or the complainant being asleep, which can be rebutted if sufficient evidence is raised. Section 76 creates conclusive presumptions, limited to deception as to the nature or purpose of the act and to impersonation, which cannot be rebutted at all.
Yes. Consent can be withdrawn at any point, and consent to one act does not amount to consent to another. Many allegations turn on a change during an encounter rather than on the encounter as a whole.
The contemporaneous record: messages before and after, the sequence of the evening, location and movement data, and the accounts of people who saw either party. It is also the material that disappears fastest, which is why the early stage matters more than any other.
Yes. Sexual assault under section 3 has the same two-part structure as rape: the Crown must prove the complainant did not consent to the sexual touching, and that the defendant did not reasonably believe they consented. The offence charged differs, the consent analysis does not.
Consent can be withdrawn at any point, and it does not carry over from one sexual act to another. Where a complainant consented to some sexual activity and not to the sexual activity that followed, the question is what was agreed to at the time of the relevant act, not what was agreed to earlier in the evening.
Yes, and these are among the most difficult cases to resolve. The question is not whether alcohol was involved but whether the complainant retained capacity, and separately, whether any belief in consent was reasonable in the circumstances. Where drugs or alcohol were administered rather than taken voluntarily, a section 75 presumption may apply instead.
No. A relationship does not supply consent to sexual activity in advance, and a person can be convicted of a sexual offence committed against a partner or spouse. Consent is assessed at the time of the relevant act.
Both have been treated as capable of vitiating consent under section 74. Agreement to protected sexual activity is not automatically agreement to unprotected activity, and deception as to gender has been held capable of removing the freedom to choose. Contrary to a common assumption, these are argued under section 74 rather than the section 76 conclusive presumptions, which the courts have kept deliberately narrow.
Seek legal advice immediately, before a charging decision is taken. The priorities are preserving the digital record while it still exists, establishing the steps taken to ascertain consent, and deciding the approach to any police interview. You can contact our team directly for a confidential discussion.
Lex Vindico Group is regulated by the Solicitors Regulation Authority. We represent individuals nationally across England and Wales in criminal, regulatory, and parallel-proceedings defence at every stage, and most decisively, at the pre-charge stage.
This article is written by Akram Mula, LLM, Solicitor Advocate and CPS-approved Prosecutor, founder of Lex Vindico Group. It is general legal information about consent and reasonable belief under the Sexual Offences Act 2003, not legal advice on any specific case. Statutory references in this article are flagged for editorial verification before publication. For advice on your specific circumstances, contact our team directly.
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