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Donnchadh practises in judicial review across all areas of public law, human rights, and civil claims against public authorities. He is regularly instructed in strategic litigation challenges on behalf of individuals and NGOs and has appeared before the Court of Appeal as junior counsel in cases concerning children’s rights and discrimination law.
Donnchadh is ranked in both Legal 500 and Chambers and Partners in his practice areas: Administrative & Public Law, Civil Liberties & Human Rights and Community Care. He was nominated for public law junior of the year at the Legal 500 Bar Awards 2023.
Alongside his public law practice, Donnchadh acts in civil claims against public authorities, challenges to unlawful detention and advises organisations on the Equality Act 2010. His civil claim practice covers a broad spectrum of issues including claims for damages under the Human Rights Act 1998, negligence claims relating to care proceedings and claims arising from misuse of private information and breach of Data Protection Act 2018 and UK GDPR.
He has particular expertise in migrants’ rights, regularly acting in civil claims and judicial reviews relating to age assessments, asylum support, and support for victims of trafficking in urgent and complex cases. He also has a strong practice in challenging the increasing use of surveillance technology on migrants, including GPS tagging.
"Donnchadh is a highly committed, versatile advocate, who is able to formulate strategy and distill the essence of a case from a high volume and complex set of case areas. His work at an incredibly high pace and in a collaborative setting is also a joy to behold." - Legal 500 2026
"Donnchadh is collaborative and meticulous. He is innovative and strategic while remaining focused on clients' objectives and circumstances." - Chambers and Partners 2026
"Donnchadh is a really brilliant junior. He is very client-focused and has lovely drafting skills." - Chambers and Partners 2026
"Donnchadh has a personable and collaborative style that makes him a dream to work with." - Chambers and Partners 2026
"He is very talented, and his keen legal mind is a valuable asset to any legal team." - Legal 500 2025
"Donnchadh is a talented advocate who cares for his clients and fights their corners fearlessly." - Legal 500 2025
“His written advocacy is good and he is excellent with the client.” - Chambers and Partners 2025
“Donnchadh is really forensic; he knows every document.”- Chambers and Partners 2025
“His advice is clear; he cuts straight to the relevant issues and he is able to provide helpful guidance.”- Chambers and Partners 2025
“Donnchadh is super responsive and dedicated to his clients. He provides really helpful and clear advice at a fast pace, and he really engages with the detail and gets very in amongst the weeds.”- Chambers and Partners 2025
"Donnchadh is very efficient."- Chambers and Partners 2025
"Donnchadh is an extremely talented and committed advocate. He understands the broader picture and can identify ways to meet the client's needs." - Legal 500 2024
"Donnchadh is a diligent, passionate and committed junior. He has excellent judgement both tactically and legally. He has expertise far surpassing his years of call." - Legal 500 2024
"Donnchadh is tenacious." - Chambers and Partners 2024
“He is very good with strategy and written work.” - Chambers and Partners 2024
Donnchadh has particular experience and interest in securing the rights of migrants in the community care context, including those who lack regularised immigration status, their children, and those subject to deportation proceedings.
Donnchadh has acted in numerous claims securing asylum support accommodation during the pandemic. Donnchadh was instructed, alongside Daniel Clarke and led by Simon Cox, in a challenge to the Secretary of State’s decision to commence evictions for refused asylum seekers during the Covid-19 pandemic.
Following the legal challenge, the Home Office withdrew its policy and agreed to accommodate refused asylum seekers until the end of the Government’s Roadmap out of lockdown.
He also has experience in advising on accommodation duties under paragraph 9 of Schedule 10 Immigration Act 2016 and difficulties that arise when securing accommodation for those who require accommodation to be approved by Probation services or the Police.
Donnchadh regularly acts in challenges to age disputes on behalf of unaccompanied asylum-seeking children and arising issues relating to support entitlement under the Children Act 1989 both in the High Court and in the Upper Tribunal. Examples include:
He also has experience in advising on leaving care duties under s.23C Children Act 1989 and retrospective ‘looked after’ children challenges.
Donnchadh is regularly instructed in judicial review matters in a wide range of areas of law including community care law, education law and prison law. He has appeared both led and unled in the High Court and has worked across all stages of judicial review proceedings and has appeared as junior counsel in the Court of Appeal. Donnchadh can advise on procedural matters and can advise at an early stage of proceedings on tactics and interim relief.
Donnchadh has recently been instructed by NGOs and claimants in relation to public law challenges flowing from the Government’s response to the Covid-19 pandemic. Examples include:
Donnchadh was also instructed on behalf of Liberty, led by Caoilfhionn Gallagher QC, to intervene in the Court of Appeal in Archer v Commissioner of Police of the Metropolis (heard on 12 May 2021, judgment reserved) which sought to argue that detention in a child’s own interests is incompatible with Article 5 ECHR.
Discrimination law interacts with all of Donnchadh’s work. Donnchad has a particular interest in the intersection of discrimination law and public law and recently acted as junior counsel in the Court of Appeal in R (The Motherhood Plan) v HM Treasury, a challenge to the Government’s self-employed income support scheme on the grounds that the scheme discriminated against women who had taken a period of maternity leave.
Donnchadh regularly advises individuals and organisations on their rights and obligations under the Equality Act 2010. Donnchadh has a broad experience in advising organisations on trans people’s access to single-sex spaces, including in the school context.
Donnchadh was instructed as junior counsel on an inquiry into a University organisation’s equality and access policies, advising on compliance with the Equality Act 2010 and providing a detailed reporting on the same.
Donnchadh acts in claims challenging the unlawful use of detention powers under the Immigration Acts and related damages claims, particularly in the High Court. He is happy to advise at an early stage of proceedings and undertake urgent instructions, where appropriate.
Donnchadh also represents individuals in applications for bail before the First-tier Tribunal giving him a well-rounded view of the issues that arise in immigration detention centres. He has delivered training on effective bail applications for immigration practitioners. He regularly accepts pro bono instructions from Bail for Immigration Detainees. His advocacy experience in the First-tier Tribunal is complemented by his High Court work in unlawful detention claims.
Donnchadh is regularly instructed on challenges to EHCPs and has assisted in all aspects of education law including advising on public law challenges and related private law issues.
He is licenced under the Direct Access Scheme and can accept instructions directly in appropriate cases.
Alongside his unlawful detention work, Donnchadh has assisted with claims against the police and damages claims against local authorities arising out of delays in issuing care proceedings and failures to protect children at risk of harm.
Donnchadh has a particular interest in data protection claims and privacy concerns and advised regularly on these issues whilst at Liberty. He has assisted in misuse of private information claims against the police and has been instructed to advise and assist on data protection complaints.