Family law guide
Part of: Child Custody Specialists
When parents cannot agree on medical treatment decisions for their child, the law does not leave the child without protection. Family courts in England and Wales treat these disputes with the highest urgency — and the outcome, for good or ill, shapes a child’s health permanently. What you do in the next few days matters enormously.
Medical treatment decisions span a wider range than many parents initially realise. Vaccination disputes, contested ADHD medication, blocked surgical procedures, refused psychiatric admission, disagreements about cancer treatment pathways — all of these reach the family court regularly. The moment you and the other parent cannot agree on your child’s healthcare, you have entered one of the most consequential areas of children’s law.
This guide explains who holds legal authority to make medical treatment decisions, how courts resolve parental disagreement, what orders are available, and where real cases have already set the boundaries. Understanding this landscape now gives you the clearest possible path to protecting your child.
Parental responsibility determines who holds the right to make medical treatment decisions for a child. The Children Act 1989 sets out who holds parental responsibility automatically and how others acquire it. Mothers hold it from birth without exception. Married fathers acquire parental responsibility upon marriage. Unmarried fathers gain it when named on the birth certificate for births registered after December 2003, or through a parental responsibility agreement or court order.
Step-parents, grandparents, and other family members carry no automatic parental responsibility — which means they hold no independent authority to make medical treatment decisions for a child, however involved their role. Our guide on applying for parental responsibility explains every route available to those wishing to acquire it.
Routine medical treatment decisions — a GP appointment, a standard prescription, a school vaccination — can generally proceed with one parent’s consent where both parents hold parental responsibility. Significant or irreversible medical treatment decisions require both parents to agree. Anything that carries real clinical risk, alters the child’s life permanently, or is actively opposed by one parent falls into this category. Without agreement — or a court order — no responsible NHS trust or private hospital will proceed.
Parents who attempt to act unilaterally on a major medical treatment decision, or who remove a child from a clinical setting without consent, risk contempt of court proceedings if an existing order governs the child’s care. Act through the court. It is faster and safer than acting alone.
Understanding the types of medical treatment disputes that reach court — and how courts have already resolved them — saves families from litigation based on arguments that have already been tested and rejected.
Vaccination refusal is now the most litigated form of medical treatment dispute in England and Wales. In Re C (Welfare of Child: Immunisation) [2003], the Court of Appeal held that vaccination under the recommended national schedule was in the child’s best interests and ordered immunisation against one parent’s objection. More recently, in Re HN (Vaccination) [2019], the court confirmed this approach across multiple vaccines. Religious and philosophical objections, however sincerely held, do not displace evidence-based public health guidance in a medical treatment decision.
The Charlie Gard case [2017] brought medical treatment decisions in life-limiting conditions to international attention. The family court, the Court of Appeal, and the European Court of Human Rights all upheld the treating hospital’s position that continued life support was not in Charlie’s best interests — despite his parents’ wish to pursue experimental treatment in the United States. The court’s starting point is always the child’s welfare, not the parental wish.
Parents regularly disagree about whether a child needs CAMHS intervention, what medication is appropriate, or whether inpatient psychiatric admission serves the child’s best interests. Where a CAMHS multi-disciplinary team has produced a treatment recommendation, courts give it significant weight. A parent who disputes the diagnosis without independent clinical evidence faces a difficult argument.
Contested surgical medical treatment decisions — particularly where one parent believes the procedure is unnecessary or carries unacceptable risk — require the court to weigh clinical evidence carefully. Courts regularly direct both parties to jointly instruct an independent surgical expert rather than accepting each parent’s favoured clinician at face value.
Every disputed medical treatment decision that reaches the family court starts from one place: the welfare principle in section 1 of the Children Act 1989. The child’s best interests are the court’s paramount consideration — not the rights or convictions of either parent. Courts apply the welfare checklist from section 1(3): the child’s physical and emotional needs, the likely effect of the decision on the child, the child’s own ascertainable wishes, and any harm the child has suffered or is at risk of suffering.
Clinical evidence from treating professionals carries the greatest weight. A written report from the child’s consultant setting out the recommended treatment, the clinical rationale, and the risks of delay or non-treatment forms the foundation of a successful Specific Issue Order application. Where the medical issues are technically complex or genuinely contested between qualified clinicians, the court directs both parties to jointly instruct an independent expert.
A Children’s Guardian — an independent officer of the court appointed by CAFCASS — represents the child’s interests separately from either parent. The Guardian speaks to the child, assesses their level of understanding and expressed wishes, and reports independently to the judge. Courts take the Guardian’s assessment seriously.
Where the medical treatment decision is genuinely urgent — where delay measurably harms the child — courts compress the entire process into days. Judges sit out of hours for emergency medical treatment applications. The system does not impose procedural delay on a child who needs immediate care.
The primary legal mechanism for resolving a medical treatment dispute is a Specific Issue Order under section 8 of the Children Act 1989. This order directs precisely how a specific question about a child’s upbringing — including disputed medical treatment decisions — should be resolved. It can authorise a proposed treatment, prohibit a treatment one parent opposes, or impose conditions under which treatment proceeds. It is binding on both parents.
Either parent can apply using Form C100. Courts list the first hearing promptly. Evidence is gathered, the Guardian reports, and a final hearing produces the medical treatment decision the court considers best serves the child. In genuinely urgent cases, a without-notice emergency application can be made on the same day, placing the matter before a judge within hours.
A Prohibited Steps Order prevents either parent from taking unilateral action about a medical treatment decision without court permission — for example, removing a child from hospital, proceeding with an alternative treatment, or withdrawing a child from a prescribed medication regime. In emergency child custody situations, both orders can be applied for simultaneously to provide immediate comprehensive protection.
Specific Issue Order vs Prohibited Steps Order: At a Glance
| Specific Issue Order | Prohibited Steps Order | |
| What it does | Resolves a specific disputed medical treatment decision | Prevents a parent acting unilaterally without court permission |
| Who can apply | Either parent (or the court can make one of its own motion) | Either parent or the court |
| Urgency | Can be made on a without-notice emergency basis | Can be made urgently, including out of hours |
| Effect | Authorises or prohibits the specific treatment | Freezes the disputed position pending full hearing |
| Examples | Order permitting vaccination / authorising surgery | Preventing removal of child from hospital |
Gillick competence — established by the House of Lords in Gillick v West Norfolk and Wisbech Area Health Authority [1985] — gives children under 16 the right to consent to their own medical treatment decisions independently of their parents, provided they have sufficient maturity and understanding to appreciate what the treatment involves, its risks, and its consequences. The treating clinician assesses competence in relation to each specific medical treatment decision — it is not a fixed status.
A Gillick competent child’s consent is legally valid and sufficient. Parents cannot override it merely by objecting. This principle extends to contraception, psychiatric treatment, surgical consent, and medication decisions — any medical treatment decision for which the child demonstrates genuine comprehension.
What Gillick competence does not do is give a child an absolute right to refuse medical treatment. Courts retain authority to override refusal where the child’s welfare demands it — particularly where refusal carries a real risk of serious harm or death. The Court of Appeal has confirmed this asymmetry repeatedly: competence unlocks the right to consent, but refusing life-saving treatment remains subject to the court’s overriding jurisdiction in the child’s best interests.
Young people aged 16 and 17 benefit from a presumption of capacity under the Mental Capacity Act 2005. That presumption can be rebutted by clear clinical evidence, but the starting point is that they make their own medical treatment decisions.
Our in-depth guide to Gillick competence in family law covers how courts apply the test across different types of medical treatment decision, including the key cases and the weight given to a child’s expressed wishes.
In a genuine life-threatening emergency, clinical professionals act without waiting for parental consent. This principle sits at the core of NHS clinical governance and is not displaced by parental disagreement. A hospital will never allow a child to die because one parent withholds consent for emergency medical treatment. Clinicians act, the law supports them, and the courts ratify that decision afterward.
Outside a genuine emergency, the position is different. Where one parent consents and the other refuses a proposed treatment, and that treatment is not immediately life-saving, NHS trusts apply to the family court for a declaration authorising them to proceed. These applications receive same-day or next-day hearings. The court’s emergency out-of-hours service exists precisely for medical treatment decisions that cannot wait for a scheduled listing.
Parents who find themselves blocking urgent medical treatment — or whose child’s treatment is being blocked — must act immediately. Every day of delay in a medical treatment dispute is a day during which a child may deteriorate. Our family lawyers regularly secure emergency hearings within 24 to 72 hours of first instruction. Do not assume the other parent will eventually agree. Make the application.
Where the medical treatment dispute is intertwined with domestic abuse, coercive control, or a pattern of deliberate obstruction, emergency child custody orders may provide broader immediate protection for both the child and the resident parent simultaneously.
Mental health medical treatment decisions generate some of the most emotionally charged and legally complex disputes families bring to the family court. One parent supports a CAMHS treatment plan — medication, therapy, inpatient admission — while the other disputes the diagnosis, rejects pharmaceutical intervention, or believes the child’s difficulties stem from the other parent’s behaviour rather than any clinical condition.
Courts approach these disputed medical treatment decisions using the same welfare framework as physical health cases, but with greater sensitivity to the child’s expressed views and the potential impact of both treatment and non-treatment on their emotional development. Where a CAMHS multi-disciplinary team has produced a written assessment and treatment recommendation, courts treat it as significant clinical evidence.
Families seeking immediate mental health support for their child should contact NHS CAMHS urgent mental health services. Where a CAMHS recommendation exists but one parent is blocking it, a Specific Issue Order application resolves the medical treatment dispute. Delay causes measurable harm — act on it.
In the most complex cases — children with dual diagnoses, severe eating disorders, or acute psychiatric crises — the clinical team may apply to the court directly for authorisation to treat. Parents in this situation should take immediate specialist legal advice rather than attempting to navigate NHS legal proceedings without guidance.
The clinical ethics service at Great Ormond Street Hospital supports families working through ethically complex medical treatment decisions, particularly where the clinical picture and the legal position interact closely.
Ask your child’s treating clinician for a written letter setting out the recommended medical treatment, the clinical rationale, the risk of non-treatment, and any time sensitivity. This document is the foundation of a Specific Issue Order application. Courts give treating clinicians’ written evidence considerable weight — particularly where it articulates what harm the child faces if medical treatment does not proceed.
Send a clear written message — email or text — confirming the other parent’s refusal to consent to the proposed medical treatment. Their response (or silence) becomes evidence. Courts see patterns of obstruction clearly when communications are properly documented. Do not rely on verbal exchanges.
Family mediation can resolve medical treatment disputes where both parents genuinely engage and the child’s health tolerates a short delay. A trained family mediator focuses both parents on the child’s welfare rather than their grievances. Where the child’s health is at immediate risk, however, mediation is not the first step — an urgent court application is.
NHS Resolution’ framework for clinical disputes provides useful context on how NHS trusts approach disputed medical treatment decisions before approaching the court.
Medical treatment decisions disputes require family lawyers who combine deep expertise in children’s law with hands-on experience of urgent applications. Kabir Family Law’s child law specialists advise parents from first instruction through to final order — providing clear, strategically focused guidance at every stage of a medical treatment dispute.
Yes — for routine day-to-day treatment. Either parent holding parental responsibility can consent to a GP appointment, a standard prescription, or a minor procedure without the other’s prior agreement. For significant, irreversible, or contested medical treatment decisions, both parents must agree or the court must decide. Where one parent proceeds with major treatment over the other’s express objection, they risk contempt of court proceedings if a child arrangements order is in place.
Either parent can apply to the family court for a Specific Issue Order under the Children Act 1989. The court considers the clinical evidence, any independent expert reports, the Children’s Guardian’s assessment, and the child’s expressed wishes where relevant. The judge makes the medical treatment decision that serves the child’s best interests. Courts list urgent medical treatment disputes quickly — sometimes within days of an application being filed.
No — not without a court order. Vaccination is a significant medical treatment decision that requires either both parents’ agreement or a Specific Issue Order. Courts have consistently found that vaccinating children according to the national immunisation schedule is in their best interests, following Re C (Welfare of Child: Immunisation) [2003] and Re HN [2019]. Philosophical or religious objections do not override public health guidance in the court’s assessment.
Gillick competence — established in Gillick v West Norfolk [1985] — allows a child under 16 to consent to their own medical treatment decisions where they have sufficient maturity and understanding to appreciate fully what the treatment involves. A Gillick competent child’s consent is legally valid independently of parental agreement. However, Gillick competence does not give a child an absolute right to refuse treatment — courts retain authority to override refusal where the child’s welfare demands it.
Yes. Where both parents oppose medical treatment that the clinical evidence clearly supports — or where both parents request treatment that clinicians consider harmful — the court makes its own medical treatment decision in the child’s best interests, overriding both parents. NHS trusts can apply to the court directly in these circumstances. The Charlie Gard case [2017] and Alfie Evans case [2018] are the most prominent recent examples of courts making medical treatment decisions against the wishes of both parents.
Genuinely urgent medical treatment decision applications can receive a hearing within 24 to 72 hours of being filed, including out-of-hours applications where a child faces immediate health risk. Non-urgent cases follow the standard timetable — a first directions hearing, evidence gathering, expert reports, and a final hearing over several weeks or months. Early specialist advice ensures the right level of urgency applies from the outset.
No. A father without parental responsibility holds no legal authority to consent to or refuse medical treatment decisions for a child. He cannot overrule the mother’s healthcare choices, sign consent forms, or compel any clinical course of action. Acquiring parental responsibility — through formal agreement or court order — changes this position entirely. Until then, his views are not legally determinative, though courts may consider them as background context in any wider family proceedings.
A blocked CAMHS recommendation or refused psychiatric treatment is a medical treatment dispute the family court resolves through a Specific Issue Order application. The CAMHS clinician’s treatment plan forms the core of your application evidence. Courts take mental health medical treatment decisions as seriously as physical health cases and factor in the harm caused by delayed treatment in their welfare assessment. Do not allow ongoing disagreement to deprive your child of care they need.
Not without parental responsibility. Step-parents hold no automatic right to make medical treatment decisions for a child, regardless of how long they have lived with the family or how significant their caring role is. A step-parent who acquires parental responsibility through a formal agreement or court order gains equal legal standing with the birth parents. Without it, medical treatment decisions remain with those who hold parental responsibility.
In practice, it means the court applies the welfare checklist from section 1(3) of the Children Act 1989. Judges consider the child’s physical, emotional, and educational needs; the likely effect of the medical treatment decision on the child; the child’s own ascertainable wishes given their age and understanding; any risk of harm from treatment or non-treatment; and the capability of each parent to meet the child’s needs. Clinical evidence shapes this analysis — but so does the broader context of the child’s life, relationships, and circumstances.
Not inherently. Applying for a Specific Issue Order about a medical treatment decision is a separate application from a Child Arrangements Order and does not automatically trigger a review of residence or contact. However, where a pattern of behaviour emerges — for example, a parent who consistently obstructs medical treatment decisions as leverage in wider disputes — courts do consider this as part of the overall welfare picture. Obstructing a child’s healthcare to gain advantage in a custody dispute is never a winning strategy.
At Kabir Family Law, our family lawyers and child law specialists understand that a disputed medical treatment decision is one of the most frightening situations a parent faces. Your child’s health is at stake. Every day of delay has real consequences. You need legal advice that is urgent, precise, and built entirely around your child’s welfare — not around the process.
Our national team has guided families through Specific Issue Order applications at 24 hours’ notice, emergency psychiatric treatment disputes, contested vaccination proceedings, and the most complex medical treatment decision cases the family courts handle. We act for parents applying for orders, parents defending against them, and families where NHS trusts have initiated court proceedings. We know this landscape thoroughly — legally and clinically.
Contact Kabir Family Law today on 0330 094 5880 to arrange your free consultation, or book an appointment that works for you. Our child specialists across London, Manchester, Cardiff, Birmingham, Nottingham, Oxford, Northampton, York, and Coventry work flexibly — because when your child’s health is in question, there is no time to waste.
Discovering that a medical treatment dispute stands between your child and the care they need is deeply frightening. It does not have to remain unresolved. The family court provides fast, workable remedies — and Kabir Family Law’s child law specialists know how to use them.
Whether you need a Specific Issue Order to authorise urgent treatment, an emergency application to override a refusal of consent, strategic guidance on a vaccination dispute, or clear advice before a disagreement reaches court — our family lawyers across England and Wales act with the urgency these cases demand.
Call us on 0330 094 5880 to arrange your free consultation or book a time that suits you. Our family lawyers in Coventry as well across York, Newcastle, Nottingham, Cardiff, Manchester, Northampton, Oxford & London are available now — because your child’s health cannot wait for a convenient moment.
6 guides — scroll sideways for more
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Autism Custody: Child Arrangements for Autistic Children
Contact with Children with Disabilities: Your Complete Legal Guide for England and Wales
Children with SEND in Custody Disputes: Your Complete Guide to Protecting Your Child’s Future
School Safeguarding Referrals: What Parents Need to Know
Child and Family Assessment: What Every Parent Needs to Know
Short videos from the Kabir Family Law team, explaining family law in plain English.
We are a team of legally trained family law and divorce specialists with years of experience across all areas of family law. We are not part of a firm of solicitors, do not undertake legal reserved activities unless permitted and are therefore entirely independent. Please subscribe to our mailing list.
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