Can a child really consent to medical treatment?

This piece came out of my Triggernometry conversation with Kellie-Jay Keen-Minshull, where Gillick competence got tangled up with something it is not: the idea that a young child can simply ask for medical transition and receive it. That is not how Gillick competence works. So let me go through it properly, because the people who need this answered most are parents trying to do right by their child, and trans young people trying to understand what is actually standing between them and care.

Where did Gillick competence come from?

It comes from a real legal dispute. In Gillick v West Norfolk and Wisbech Area Health Authority [1985] UKHL 7^[1], the House of Lords ruled on whether doctors could provide contraceptive advice or treatment to a girl under 16 without her parents' consent. Victoria Gillick brought the challenge. The Lords found against her. Lord Scarman explained the reasoning: parental authority does not end at a fixed date, it diminishes as the child develops the understanding needed to make their own decisions. A child who reaches that point for a particular decision can give legally valid consent to it.

Although the original case concerned contraception, the principle became the general framework used across England and Wales when assessing whether a child under 16 can consent to medical treatment. It is not a loophole, and it is not a recent invention. It has been law for four decades.

Gillick competence and the Fraser guidelines are not the same thing

This matters, because they are routinely run together and they should not be. Both came out of the same case, but they do different jobs. Gillick competence is the broader test: can this child understand this decision well enough to consent to it? It applies across medicine. The Fraser guidelines^[2] are specific to contraception and sexual-health advice. They ask whether the young person understands the advice, whether they are likely to have sex regardless, whether their health would suffer without treatment, and whether providing it without parental consent is in their best interests. The Fraser guidelines are not a general checklist for all medical treatment, and treating them as one misrepresents both frameworks.

What a child actually has to be able to do

The GMC's guidance on decision-making with children^[3] is clear. To be assessed as Gillick competent, a child must be able to understand:

• the nature and purpose of the proposed treatment
• its likely benefits and its risks
• what the available alternatives are
• the possible consequences of having the treatment
• the consequences of refusing it, or of receiving no treatment at all

And understanding is not passive. The child must be able to retain that information, use it and weigh it, and communicate their decision. The clinician must provide and discuss all of it before reaching a judgment. A child who says "I want this" has started a conversation, not concluded one.

The complexity of the treatment matters too. A child may well be competent to decide about a straightforward, low-risk procedure and not competent to decide about a more serious intervention with long-term or irreversible consequences. Maturity, health, emotional development, and the specific demands of the decision all go into the assessment. A child can be found not competent. When that happens, consent will normally be sought from someone with parental responsibility.

The assessment is the safeguard. When people ask whether there is any check on what a young person can access, this is it: a clinical judgment made by a qualified professional, in real time, for this child, this treatment.

Listening is the beginning of the assessment, not the end

A young person can describe their identity, their distress, and what they want, without that automatically meaning they have the capacity to consent to every possible intervention. Those are different things, and a careful clinician treats them as different things. A child can be believed and supported without a prescription following automatically. Gillick competence does not let a child self-diagnose, self-prescribe, or direct a clinician to provide a treatment that is not appropriate for them. Being heard is the start of a clinical assessment, not the conclusion of one.

Where parents sit in the process

Parents remain important. The GMC guidance^[3] is clear that clinicians should involve children in decisions even where those children cannot yet consent independently, and that parental involvement is generally encouraged. In practice, clinicians seek collaborative agreement wherever possible. Most decisions about a young person's healthcare involve the young person, their parents, and the clinical team working together.

If an under-16 is assessed as Gillick competent for a particular decision, their consent may legally be sufficient without parental agreement. If they are not competent, someone with parental responsibility normally gives consent on their behalf. If parents disagree with one another, and that disagreement cannot be resolved, clinicians should seek legal advice. The courts can determine what is in the child's best interests. Court involvement is an additional safeguard in serious disputes, not something that happens automatically in every disagreement.

Each gender-related intervention is its own decision

This is the part that gets flattened in public debate, and it should not be. Social support, puberty suppression, and gender-affirming hormones are three distinct things with different purposes, different risk profiles, different benefits, and different consequences. They are not one lump decision. Competence and consent must be assessed separately for each proposed treatment, at the time it is proposed. Supporting a young person's account of their gender does not automatically mean prescribing anything. Believing a child is not the same as treating them, and the claim that a child can simply request transition and immediately receive it does not reflect how this framework operates at any stage.

What the current NHS England specification actually requires

The NHS England service specification published in April 2026^[4] requires holistic, multidisciplinary assessment, an individualised care plan, and full involvement of the child and family. It states plainly that medical intervention is not the standard approach and that the primary intervention is biopsychosocial and psychological support.

That specification reflects genuine care about process. It also carries a cost that the specification itself does not name, and I want to name it here. A demanding multidisciplinary assessment takes time. Young people waiting inside that process are not waiting in a neutral space: puberty is continuing. Every month of an unwanted puberty is a permanent physical change. The assessment is a real safeguard. The waiting time attached to it is a real harm, and a fair account of the current system says both.

So: can a ten-year-old consent to medical treatment?

That is the question a worried parent is actually asking, and the honest answer is: it depends on the child, the treatment, and the clinical assessment. A ten-year-old is unlikely to be assessed as Gillick competent for a serious or complex medical intervention with long-term consequences. A ten-year-old might be competent to consent to something straightforward. Neither answer is given in advance by a rule. It is given by a clinician, for this child, this decision, at this moment.

What Gillick competence is not is a blank cheque handed to children. It is a framework built specifically to take children seriously without taking clinical judgment out of the picture. A child who understands what is being proposed, what can go wrong, what the alternatives are, and what it means to refuse, and who can use and weigh all of that, has demonstrated something real. A child who cannot has not been failed by the system; the system has simply done its job.

The conversation I had on Triggernometry made clear how often this framework gets described as the absence of safeguards. It is the opposite. It is one of the most carefully constructed consent frameworks in English medical law, and it has been tested in courts for forty years. What it is not is a reason to withhold care from young people who genuinely need it and can genuinely understand what they are asking for.

If there is a topic that you would like me to cover, just let Sammy know.

Written by Dr Helen Webberley, Gender Expert and founder of GenderGP. Helen holds an MBChB, MRCGP, and a Master's degree in Human Sexuality. She has spent years working with trans people and their families, and is committed to making accurate information about gender-affirming care accessible to everyone.