Profile
Peter Mant specialises in public and administrative law, mental capacity and medical treatment, and regulatory law. He is ranked as a leading practitioner in The Legal 500 and Chambers and Partners. He has been described in the directories as an “excellent advocate”, “calm in the eye of the storm” and “great on his feet”.
His broad practice spans most areas governed by public law, regulation and human rights. He appears regularly in the High Court, Court of Appeal, Court of Protection and other tribunals. Clients include individual claimants and non-governmental organisations (NGOs), central and local government departments, and national regulators.
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Peter Campbell
Director of Clerking
Publications
- The Regulation of Healthcare Professionals: Law Principles and Process, 2nd Ed, Sweet & Maxwell 2019
- Disciplinary and Regulatory Proceedings, 10th Ed, Lexis Nexis 2019
- Current Law Statutes: Annotations to the Health Act 2009, Sweet & Maxwell 2010
- The Law of Human Rights, 2nd Ed, Oxford University Press 2009
Additional Information
Other Positions
- Islington Law Centre Management Committee: 2011-2019
- Lawyer to the Registry of the European Court of Human Rights: 2009-2010
- Office of the United Nations High Commissioner for Refugees: 2004
- Long-suffering supporter of Oxford United F.C.
Pro Bono
Peter is very happy to accept pro bono instruction where appropriate. He has worked with a rane of legal charities and non-governmental organisations including Liberty, Islington Law Centre and the Anti-Trafficking and Labour Exploitation Unit (ATLEU). He acted in one of ATLEU’s first cases on behalf of a migrant domestic worker, securing an award of over £80,000 for a woman who had been abused, discriminated against and forced to work unpaid for several years.
Publications
- The Regulation of Healthcare Professionals: Law Principles and Process, 2nd Ed, Sweet & Maxwell 2019
- Disciplinary and Regulatory Proceedings, 10th Ed, Lexis Nexis 2019
- Current Law Statutes: Annotations to the Health Act 2009, Sweet & Maxwell 2010
- The Law of Human Rights, 2nd Ed, Oxford University Press 2009
Additional Information
Other Positions
- Islington Law Centre Management Committee: 2011-2019
- Lawyer to the Registry of the European Court of Human Rights: 2009-2010
- Office of the United Nations High Commissioner for Refugees: 2004
- Long-suffering supporter of Oxford United F.C.
Pro Bono
Peter is very happy to accept pro bono instruction where appropriate. He has worked with a rane of legal charities and non-governmental organisations including Liberty, Islington Law Centre and the Anti-Trafficking and Labour Exploitation Unit (ATLEU). He acted in one of ATLEU’s first cases on behalf of a migrant domestic worker, securing an award of over £80,000 for a woman who had been abused, discriminated against and forced to work unpaid for several years.
Contact Us
Peter Campbell
Director of Clerking
Areas Of Expertise
Peter acts in high-profile judicial review claims and statutory appeals. He advises on complex matters of governance and policy. His areas of expertise include healthcare, social care and human rights.
He is a contributor to a leading textbook on human rights Clayton & Tomlinson (2nd Ed) and he worked at the European Court of Human Rights in Strasbourg.
Cases of note:
- Welsh Ministers v PJ [2018] UKSC 66 – Limits on the power of a responsible clinician to impose restrictive conditions under a community treatment order.
- Cheshire West and Chester Council v P [2014] UKSC 19 – Landmark case on deprivation of liberty in care settings.
- Adil v General Medical Council [2023] EWCA Civ 1261 – Freedom of expression and social media comments by regulated professional.
- R (CXF) v Central Bedfordshire CCG [2018] EWCA Civ 2852 – Scope of duty to provide aftercare services under s117 of the Mental Health Act (MHA).
- R (Raschid) v LB Merton [2016] EWCA Civ 622 – Costs in judicial review proceedings that are withdrawn after grant of interim relief.
- R (British Medical Association) v General Medical Council [2025] EWHC 960 – Challenge to core professional standards guidance for physician associates and anaesthesia associates.
- R (RB Kensington & Chelsea) v NHS North West London ICB [2025] EWHC 889 – Dispute between public authorities about funding for children’s continuing care.
- R (Young) v General Medical Council [2021] EWHC 534 (Admin) – Claim by Chief Scientific Advisor to the Department of Health in Northern Ireland against decision to pursue disciplinary case arising out of the Inquiry into hyponatremia-related deaths.
- Glatter v NHS Herts Valley CCG [2021] EWHC 12 (Admin) – No duty to hold a full public consultation in respect of hospital reorganisation
- R (Dawson) v United Lincolnshire Hospitals NHS Trust [2021] EWHC 928 (Admin) – Consultation challenge to covid-related health service reorganisation.
- R (Bramhall) v General Medical Council [2019] EWHC 3523 (Admin) – Challenge by leading transplant surgeon to decision to re-open regulatory proceedings following criminal conviction for marking initials on patients’ livers.
- R (Hutchinson) v Secretary of State [2018] EWHC 1698 (Admin) -Public interest claim challenging a proposed new model for provision of health and social care in England.
- R (Hawking) v Secretary of State for Health [2018] EWHC 989 (Admin) – Judicial review costs capping order in crowd funded case (in which the late Stephen Hawking was lead claimant).
Peter has appeared in numerous appeals and judicial review claims for and against regulators. The regulators that he has acted for and/or advised in recent years include the General Medical Council (GMC), Professional Standards Authority (PSA), General Dental Council (GDC), Royal College of Veterinary Surgeons (RCVS), Solicitors Regulation Authority (SRA), Bar Standards Board (BSB) and Royal Institution of Chartered Surveyors (RICS). He also acts for regulated professionals, companies and trade unions.
He is a contributor to two of the leading textbooks on regulatory law: Disciplinary and Regulatory Proceedings (10th Ed) and The Regulation of Healthcare Professionals (2nd Ed). Peter also advised the GMC on parts of its consent guidance.
Cases of note:
- Suresh v General Medical Council [2025] EWHC 804 (KB) – No duty of care owed by regulator to professional under investigation.
- Gleeson v Social Work England [2024] EWHC 3 (Admin) – Appeal against strike off for emotionally abusive behaviour in private life.
- Adil v General Medical Council [2023] EWCA Civ 1261 – Freedom of expression and social media comments by regulated professional.
- Webberley v General Medical Council [2023] EWHC 734 (Admin) – Appeal by “Gender GP” against suspension for professional misconduct in relation to hormone treatment.
- Byrne v General Medical Council [2021] EWHC 2237 (Admin) – Appeal against erasure by psychiatrist who engaged in sexual relationship with patient. Leading case on approach to appeals against findings of fact and duty to give reasons.
- Bux v General Medical Council [2021] EWHC 762 (Admin) – Conflict of interests and medical report writing.
- Yusuff v General Medical Council [2018] EWHC 13 (Admin) – Guidance case on continuing denials at fitness to practise review hearings.
- Professional Standards Authority v (1) NMC (2) Judge [2017] EWHC 817 (Admin) – Regulator’s appeal against decision not to strike off nurse who physically abused vulnerable patient.
- Irvine v General Medical Council [2017] EWCA Civ 1296 and [2017] EWHC 2038 (Admin) – Appeal against erasure for dishonesty in respect of indemnity cover.
- Shaw v GOsC [2015] EWHC 2721 (Admin) – Leading case on the scope of “unacceptable professional conduct”.
- Professional Standards Authority v (1) General Chiropractic Council (2) Briggs [2014] EWHC 2190 (Admin) – Leading case on “under prosecution”.
Peter acts and advises in some of the most challenging Court of Protection cases.
Matters in which he has been instructed in recent years include end of life cases, serious medical treatment involving a range of invasive procedures, capacity to enter into sexual relations, and use of the High Court’s inherent jurisdiction.
Peter is particularly expert in matters concerning deprivation of liberty and the overlap between the Mental Health Act 1983 (MHA) and the Mental Capacity Act 2005.
Cases of note:
- Welsh Ministers v PJ [2018] UKSC 66 – Limits on the power of a responsible clinician to impose restrictive conditions under a community treatment order.
- Cheshire West and Chester Council v P [2014] UKSC 19 – Landmark case on deprivation of liberty in care settings.
- Great Ormond Street Hospital for Children NHS Foundation Trust v ZG [2025] EWHC 1042 (Fam) – Withdrawal of artificial ventilation.
- Wessex Fertility v Human Fertilisation and Embryology Authority [2024] EWHC 587 – Lawfulness of contacting doner of gametes against her express wishes.
- Re CD (Treatment: Haemodialysis) [2024] EWCOP 55 – Best interests for patient resisting haemodialysis treatment.
- Alder Hey Children’s NHS Foundation Trust v D & Ors [2023] EWHC 1997 (Fam) – Withdrawal of life sustaining treatment from child.
- Cumbria, Northumberland Tyne & Wear NHS Foundation Trust & Another v EG [2021] EWHC 2990 (Fam) – Community deprivation of liberty of restricted patients under MHA.
- A Local Authority v DY [2021] EWCOP 28 – Capacity to decide to engage in sexual relations.
- London Borough of Tower Hamlets v PB [2020] EWCOP 34 – Capacity and alcohol dependence.
- A Clinical Commissioning Group v AF [2020] EWCOP 16 – First-ever remote Court of Protection trial in case concerning withdrawal of clinically-assisted nutrition and hydration (CANH).
- London Borough of Croydon v KR & Anor [2019] EWHC 2498 (Fam) – Limits of the inherent jurisdiction to protect vulnerable adults.
- A Clinical Commissioning Group v P (Withdrawal of CANH) [2019] EWCOP 18 – Withdrawal of life sustaining treatment.
- MASM v MMAM [2015] EWCOP 3 – Leading case on contempt in Court of Protection.
Peter acts and advises in major investigations, inquiries and inquests.
Cases of note:
- Forbury Gardens Inquest – Representing NHS Trust that provided secondary mental health care for perpetrator of terror attack.
- Local Authority IDSC – Acting as legal advisor to a local authority considering disciplinary allegations and grievances against its most senior officers.
- Infected Blood Inquiry – Acting for past trustees of the haemophilia society.
- Independent Inquiry into Child Sexual Abuse – Representing core participant in the Archdiocese of Birmingham case study.
- Inquest into the Death of Cheryl James – Acting for family of young soldier who died at Deepcut barracks.
- E.coli Public Inquiry – Representing the Food Standards Authority in inquiry into outbreak of E.coli in schools in South Wales.
Peter has a special interest in costs and litigation funding, particularly where the issues relate to his core practice areas of regulation and judicial review.
Cases of note:
- R (Hawking) v Secretary of State for Health [2018] EWHC 989 (Admin) – Judicial review costs capping order in crowd funded case (in which the late Stephen Hawking was lead claimant).
- R (Raschid) v LB Merton [2016] EWCA Civ 622 – Costs in judicial review proceedings that are withdrawn after grant of interim relief.
