Gethin Thomas has a broad practice across all areas of Chambers’ specialisms, with a particular interest in public law & human rights, environment & planning, commercial, construction and regulatory law.
He appears frequently in court, and regularly undertakes pleading and advisory work. Reflecting the breadth of his practice, Gethin has acted as sole or junior counsel in proceedings in the Court of Appeal, Administrative Court, Commercial Court, Queen’s Bench Division, and Technology & Construction Court.
Gethin graduated from the University of Oxford with a First Class law degree. Before joining the bar, Gethin worked as a research assistant at the Law Commission for two years. As a member of the public law team, he worked on a range of law reform projects in areas such as electoral law, misconduct in public office and wildlife law. He also worked on a project that proposed a new system of codification for the law applicable to Wales.
Latterly, Gethin interned at the human rights charity JUSTICE. He worked in the administrative justice team.
Administrative & Public
Gethin has a keen interest in all areas of public law, including civil liberties and human rights, healthcare law, community care and court of protection, electoral law, education law, immigration and asylum, housing, public procurement, EU law, inquiries and social security. He also has a particular interest in data protection and information law.
Gethin has acted in judicial review proceedings, as both sole and junior counsel. He has drafted grounds, and advised on a broad range of public law issues. He has appeared in the Administrative Court.
Gethin is currently instructed as junior counsel to Charlie Corey-Wright QC by NHSBT, a core participant in the Infected Blood Inquiry.
Gethin is a member of the Government Legal Department’s ‘Junior Junior’ scheme.
Gethin’s recent instructions include:
- Acting as a junior junior, instructed by the Government Legal Department, in the judicial review challenge to the Heathrow third runway (R. (on the application of Spurrier) v Secretary of State for Transport  EWHC 1070 (Admin)).
- As junior counsel, acting on behalf of Welsh Government, in relation to a judicial review brought by the Medical Defence Union, challenging its decision not to introduce an existing liabilities indemnity scheme for GP’s (Medical Defence Union v Welsh Government & ors, led by Clive Sheldon QC and Tom Cross).
- As sole counsel, successfully defending a judicial review claim, on behalf of the Financial Ombudsman Service, in the Administrative Court.
- Assisting Kelly Stricklin-Coutinho, in relation to a judicial review claim challenging the outcome of a competition for funding for an energy project.
- Advising the Windrush Lessons Learned Review.
- As junior counsel to Katherine Apps, assisting to advise in respect of a matter arising out of Brexit.
- Advising a local authority on electoral and information law issues, concerning data held pursuant to the electoral register.
- As junior counsel to Sadie Crapper and Martin Westgate QC, instructed by the Police Federation, acting in respect of an overtime claim brought by undercover police officers.
- As sole counsel, drafting the summary grounds of resistance on behalf of the Financial Ombudsman Service in relation to a judicial review claim.
- Acting on behalf of the Civil Aviation Authority, in the High Court, in a successful strike out application of a claim in relation to a decision to provisionally suspend a pilot’s medical certificate.
- Providing research assistance in respect of a judicial review challenge to the closure of a federated primary school.
- Acting on behalf of a university, in defending a claim brought against it alleging breach of contract and misrepresentation.
- Advising a local authority as to the lawfulness of a delegation of power.
- Advising the Office for Students, as consultant counsel.
- Advising the Financial Ombudsman Service, as consultant counsel.
Gethin also has experience of proceedings involving the Human Rights Act 1998 and the Equality Act 2010.
During pupillage, Gethin gained experience of a wide range of public law matters, including:
- A Supreme Court appeal concerning the operation of ouster clauses and whether the Investigatory Powers Tribunal is amenable to judicial review (R (on the application of Privacy International) v Investigatory Powers Tribunal and others  UKSC 22)
- An Article 8 immigration case concerning the scope of private life for non-national out of country applicants;
- Drafted a statement of grounds for a precedent fact immigration judicial review;
- Researched the scope of the ‘judicial function’ exception under the public sector equality duty in the context of a judicial review claim;
- Cases concerning the scope of an effective appeal for the purposes of Article 8, and the application of R (on the applications of Kiarie and Byndloss) v Secretary of State for the Home Department  UKSC 42;
- Drafted a statement of grounds in relation to a challenge to the Secretary of State’s decision to remove the Claimant from the UK under Dublin III Regulations;
- Drafted a response to a Pre-Action Protocol intimating a judicial review claim against the Secretary of State’s decision to conduct a badger cull.
Prior to pupillage, Gethin worked on public law reform projects in areas such as electoral law, misconduct in public office and wildlife law. He has particular experience of those areas.
Gethin also worked on a project that proposed a new system of codification for the law applicable to Wales, and has a particular interest in Welsh law.
Gethin was an administrative justice intern at JUSTICE.
As a volunteer with the Free Representation Unit, Gethin has also successfully represented claimants in social security appeals before the First-Tier Tribunal.
Environmental & Planning
Gethin has an extensive environmental and planning law practice. Gethin is regularly instructed to advise on a broad range of planning and environmental matters. He has experience of acting in inquiries. Gethin has also acted in judicial review proceedings, as both sole and junior counsel.
Gethin has a particular interest in environmental law. He is a contributing editor of the Environmental Law Bulletin (published by Sweet & Maxwell). Gethin is also a member of the Environmental Law Foundation, through which he provides pro bono assistance on environmental matters.
Recent environmental matters include:
- Acted as junior counsel to Richard Wald QC, instructed by Natural Resources Wales, in a four-week Inquiry concerning the implementation of byelaws for the conservation of salmon and sea trout stocks in Welsh rivers. For more information, please see here: https://www.39essex.com/welsh-government-announces-confirmation-of-conservation-byelaws//
- Acted as a junior junior on the judicial review challenge to the Heathrow third runway, instructed by the Government Legal Department.
- Assisted Nigel Pleming QC in relation to a matter arising from the scope of the definition of ‘public authority’ pursuant to the Environmental Information Regulations 2004.
- Drafted submissions, on behalf of the Environmental Law Foundation, in respect to the climate change impacts of the DCO application to open Manston Airport.
- Advising a local authority as to matters arising from its declaration of a climate emergency.
- Advising on Tree Protection Orders and the Hedgerows Regulations.
Gethin also has experience of nuisance claims. As a pupil, Gethin assisted in respect of a private nuisance claim for group litigants concerning odour and noise emissions, and a claim under Part 1 of the Land Compensation Act 1973 concerning noise, odour and air pollution.
Gethin has written articles, and delivered seminars and lectures on environmental matters, such as climate change, air quality, environmental impact assessments and habitats regulation.
He is also a member of LexisNexis’ Q&A Panel.
Gethin has a busy planning practice. He advises developers, consultants, local authorities, and private clients on all aspects of the planning process, including planning enforcement, and planning appeals. Examples of his recent instructions include:
- Assisted John Steel QC in advising as to a statutory blight compensation claim for HS2 safeguarded land.
- Acted as junior counsel to Brian Ash QC on behalf of the claimant in a judicial review claim against a reserved matters decision of a local authority.
- Acted as junior counsel, assisted in respect of an enforcement appeal to the High Court pursuant to section 289 of the Town and Country Planning Act 1990.
- Advising a developer as to prospects of successfully appealing a refusal of planning permission to build within the Green Belt.
- Advising a developer in relation as to an alleged material change of use.
- Advising as to permitted development rights.
- Advising as to an application for a Lawful Development Certificate for existing use.
- Advised a developer as to the prospects of appealing a refusal to grant a certificate of lawful development.
- Advised a developer in relation to issues arising from the removal of permitted development rights by planning conditions.
- Appeared as sole counsel in committal proceedings for breach of an enforcement injunction before the High Court.
- Advised a local authority as to the prospects of being granted an enforcement injunction.
- Drafting a judicial review pre-action protocol letter in respect of an LPA’s decision to decline to determine a planning application.
- Advising as to the prospects of judicially reviewing an LPA’s decision to take direct action pursuant to an enforcement notice.
- Assisting Daniel Stedman-Jones in respect of an appeal against a section 215 notice.
During pupillage, Gethin gained a broad range of experience of planning and environmental matters, including:
- A two week planning inquiry relating to a site in London Borough of Tower Hamlets;
- Drafted a statement of facts and grounds challenging a grant of planning permission;
- Drafted an advice on the scope of amendments to conditions that may be pursued under section 73 of the Town and Country Planning Act 1990;
- Drafted an advice relating to restrictive covenants over accommodation works.
Gethin welcomes instructions in property matters. He has experience of a wide range of property disputes. His recent instructions include, for example, advising as to break and surrender clauses in a commercial lease, and acting in forfeiture proceedings. Gethin also has experience of residential property cases.
Commercial, Construction & International Arbitration
Gethin has a keen interest in general and international commercial and construction law. He has a particular interest in procurement, PFI and project financing.
Gethin has appeared as both sole and junior counsel in commercial and construction proceedings in the High Court (in the Technology & Construction Court, Commercial, and Queen’s Bench Division). He also frequently appears in commercial and construction matters before the County Court. He has extensive experience of drafting pleadings, and frequently advises on a broad range of commercial and construction matters, often complex and high-value. Examples of recent instructions are listed below.
Gethin also has experience of international arbitration. During pupillage, Gethin assisted on a major ICC arbitration concerning payment disputes, delay and variation claims (whilst supervised by Rachael O’Hagan, being led by Alexander Nissen QC and Calum Lamont). He was involved in the matter in the lead-up to, and throughout, the trial.
In addition, he has particular experience in financial services, having acted as consultant counsel to the Financial Ombudsman Service. He has advised on a wide range of matters under the Financial Services and Markets Act 2000. He also regularly advises on complex agency issues.
Gethin’s recent instructions include:
- As junior counsel, acting in relation to a claim in the High Court for a breach of contract, involving allegations of fraud, on behalf of a multinational company.
- As junior counsel, led by Samar Abbas, defending a breach of contract claim in the High Court and Court of Appeal, in which £4.5 million had been claimed against an NHS Trust.
- As sole counsel, successfully resisting an application to enforce an adjudicator’s decision, in the High Court.
- As sole counsel, defending a breach of contract claim to trial in the TCC.
- Advising as to challenging an adjudicator’s jurisdiction, and prospects of resisting enforcement of the adjudicator’s decision.
- As sole counsel, advising a local authority in respect to a breach of contract claim intimated against it.
- As sole counsel, drafting particulars of claim, contending a breach of a contract on behalf of a construction company (involving issues of delay and defective work).
- As sole counsel, advising and drafting particulars of claim in respect to a private nuisance claim.
- As sole counsel, drafting particulars of claim, on behalf of a local authority, contending breaches of a JCT Contract.
- As sole counsel, successfully resisting an application, to be added as a party to breach of contract proceedings.
- As sole counsel, to draft particulars of claim for breach of contract on behalf of a major retailer.
- As sole counsel, successfully resisting an application to re-instate a struck-out claim concerning a construction dispute.
- Acting on behalf of a university, in defending a claim brought against it alleging breach of contract and misrepresentation.
During pupillage, Gethin gained experience of a variety of matters, including:
- A major ICC arbitration concerning payment disputes, delay and variation claims.
- An international arbitration, concerning consequential loss and exclusion clauses.
- An advice for a corporate client on the implications of the US withdrawal from the relief of Iranian sanctions under the JCPOA. Gethin has a particular interest in international sanctions.
- An adjudication jurisdiction dispute.
Gethin is contributing to the next edition of Wilmot-Smith on Construction Contracts.
As a pupil, Gethin was a member of the winning team in the Worshipful Company of Arbitrators Mediation Skills Competition 2018.
Before commencing practice, Gethin interned with the Chief Justice of Hong Kong at the Court of Final Appeal.
Regulatory & Disciplinary
Gethin has a keen interest in regulatory and disciplinary law. His experience includes:
- Acting in proceedings before the Solicitors Disciplinary Tribunal.
- Advising the Financial Ombudsman Service as consultant counsel.
- Advising the Office for Students as consultant counsel.
- Acting on behalf of the Civil Aviation Authority, in a successful strike out application of a claim in relation to a decision to provisionally suspend a pilot’s medical certificate in the High Court.
During pupillage, Gethin gained experience of a range of regulatory and disciplinary matters, including:
- Drafting a witness statement for a Registrant in proceedings before the HCPC Tribunal;
- Drafting an advice in relation to proceedings before the Royal College of Veterinary Surgeons;
- Drafting summary grounds of defence in a judicial review challenge to an interim order of the General Medical Council.
Gethin has also gained experience of regulatory law whilst working in electoral law and misconduct in public office at the Law Commission.
Financial Services & Banking
Gethin is developing a practice in financial services & banking law. Gethin is currently consultant counsel to the Financial Ombudsman Service, where he advises on a wide range of issues under the Financial Services and Markets Act 2000.
Recent matters include, for example:
- Advising as to apparent and ostensible agency;
- Advising as to the meaning of ‘credit’ and the scope of ‘financial accommodation’;
- Advising as to issues arising from application of Anderson v Sense Network  EWCA Civ 1395 |  7 WLUK 533.
Gethin also has a particular interest in the regulation of cryptoassets.
Gethin has a very keen interest in EU law. His recent EU law experience includes acting as junior counsel to Katherine Apps, assisting to advise in respect of a matter arising out of Brexit.
Gethin has also recently written an article on Canary Wharf (BP4) T1 Ltd v European Medicines Agency  EWHC 335 (Ch), published by Thompson Reuters’ Practical Dispute Resolution Blog.
Gethin appears regularly in the County Court. He also has experience of various types of hearings including applications from relief from sanctions, specific disclosure, approval of settlements for infants and protected parties, as well as costs and case management hearings. He also undertakes both drafting and advisory work.
Gethin has experience of public liability and employers’ liability claims, as well as claims in which fundamental dishonesty is alleged.
During pupillage, he gained broad experience of civil liability matters including:
- A claim brought by a dependent under the Fatal Accidents Act 1976
- Research for the purposes of drafting an advice on vicarious liability, applying Cox v Ministry of Justice  UKSC 10 and Armes v Nottinghamshire County Council  UKSC 60;
- Drafted an advice, and a defence, in relation to clinical negligence claims brought against both the NHS and a private healthcare provider, which raised issues of non-delegable duty and vicarious liability;
- Part 20 Claim by an employer against independent contractor for indemnity or contribution;
- Drafted schedules of loss and counter schedules, including for claims concerning traumatic brain injury and chronic pain.
As noted above, during pupillage Gethin also gained experience of group litigation nuisance claims.