Cian has extensive experience in international law having spent ten years as a legal academic before coming to the Bar. In 2024 he published By Peaceful Means: International Adjudication and Arbitration as part of a team led by Judge Charles N. Brower and President Joan D. Donoghue of the International Court of Justice.

Cian’s work includes:

• Advice on an Application for Interim Measures from the European Court of Human Rights;
• Assistant to the ICSID Arbitration Tribunal in Kim v Uzbekistan (ARB/13/6);
• Consultant for a report for the European Parliament on counter-terrorism laws across Europe.

Cian’s earlier publications include an award-winning book, EU Counter-terrorism Law, and extensive writings on EU, international, and transnational law. His current research focusses on advisory opinions of the World Court.

Cian has led NGO rule of law training and spoken at remote oral advocacy training. He has also collaborated on events and programmes with The AIRE Centre, JUSTICE, Lawyers without Borders, and Delos Dispute Resolution. He is a member of the World Justice Project’s Rule of Law Research Consortium, the American Society of International Law, and the European Society of International Law. 

Cian has significant public law expertise. He has been instructed in relation to judicial review proceedings involving local authorities, Government departments, and in relation to the Coronial jurisdiction.

His successes have included ensuring accountability for actions taken in response to the Coronavirus pandemic. In one such challenge, the Government conceded the need to make changes to its policy on charges for hotel quarantine.

Cian has a particular commitment to the rights of protesters, and has represented protesters in criminal court, as well as assisting with judicial review and civil claims in protest cases. He also advises and offers representation in judicial review matters in the fields of education, Coronial law, and data protection law.

Cian also has an interest in international matters or those with a cross-jurisdictional dimension. He has written about the challenges that decisions such as AB v. Secretary of State for Justice [2021] UKSC 28 pose for human rights advocacy in the European Human Rights Law Review.

Cian regularly acts in inquests touching on deaths in settings including prisons, hospital, mental health custody, and in the community. His inquest practice also benefits from his experience in other fields, including actions against public authorities, education, and community care law, as well as his expertise on the European Convention on Human Rights.

Cian’s instructions have included in inquests into the deaths of:

• Melissa Parrish, who died a self-inflicted death after a failure in an Eating Disorder Clinic (reported by The Independent and Sky News);
• Daniel Weighman, in which the jury found multiple failures contributed to the death, and the Coroner made a Prevention of Future Deaths report;
• Nashon Esbrand, in which the jury found “clear and direct causal connection” between police failings and Nashon’s murder;
• Caitlin Mack, whose death in the community may have been avoided with mental health support and appropriate accommodation;
• Stephen Weatherley, whose death led the Coroner to make a Prevention of Future Deaths report to the Ministry of Justice;
• Daniel Varndell, whose death after release from prison led the Coroner to make a Prevention of Future Deaths report in relation to release conditions;
• Peter Hart, a frontline medical worker who died from COVID-19 after he was infected while working in an A&E Department;
• an individual who died while in the healthcare unit of a prison in relation to which the jury found neglect and extensive causative failings contributed to death.

Cian was led by Maya Sikand KC in the inquest into the death of Mark Culverhouse, who took his own life while unlawfully detained at HMP Woodhill. The jury found that a defect in the system of licence recall and release, as well as detention in the Segregation Unit, contributed to Mark’s death.

He was led by Fiona Murphy in the inquest into the death of Shane Bryant, who died after a 17 minute long restraint by an off-duty police officer and members of the public. The jury found that unreasonable force, and missed opportunities, both contributed to the death.

Cian has particular expertise on the engagement of Article 2 ECHR and has given training on Article 2 and its role in inquests and related civil claims. He accepts appropriate instructions on a public access basis.

Cian advises in relation to data protection claims and related issues in information law – in particular against the police and public authorities in relation to the disclosure of sensitive personal data.

His recent instructions include:

• advices in relation to the disclosure of sensitive personal data in an education setting and in the healthcare setting;
• the defence of a data protection and breach of confidence claim against a solicitors firm;
• assistance with the preparation of the Media Lawyers Association Online Safety Guide for Journalists.

Cian has significant expertise on the impact of technology on privacy and related human rights. He has recently written about the Council of Europe’s Framework Convention on Artificial Intelligence. 

Cian undertakes education work, and community care work, including under instructions from the Official Solicitor on behalf of vulnerable children and adults, representation before the High Court (Administrative Court), and Special Educational Needs and Disability First Tier Tribunals, and in relation to deprivation of liberty proceedings. Cian’s recent instructions include:

• a successful application for judicial review of a local authority’s failure to issue an EHC Plan within the statutory timeframe;
• claims for unlawful removal of children from their parents, for failure to remove children, and for delays in the issue of care proceedings;
• the successful appeal against a refusal by a local authority to issue an EHC Plan for a child with special educational needs that arose from anxiety;
• advice in relation to judicial review proceedings for failure to implement an EHC Plan;
• a claim for delay in the issue of a deprivation of liberty proceedings.

Cian has a strong commitment to access to education and undertakes pro bono work in this field.

Cian offers advice and representation in relation to actions against public authorities, including the police, as well as prisons and local authorities. Recent instructions have included:

• Successful claims by prisoners against unlawful-strip searches in prison;
• Advice on a claim against a police force for violation of the Equality Act, Data Protection Act, and Human Rights Act;
• A successful claim on behalf of a family whose home was wrongfully subject to a search.

Cian is a member of the Police Action Lawyers Group (PALG), and is a contributor to the LAG book: Police Misconduct: Legal Remedies in its chapters on police organisation and on anti-discrimination law and the police.