Oskar Butcher

I am a Supervising Solicitor in the Public Law and Immigration department, having joined the firm’s City of London office in September 2021 and qualified as a Solicitor in September 2023.

My work incorporates a wide range of public law matters, predominantly in the field of immigration and human rights. I have extensive experience representing highly vulnerable clients, including victims of torture and human trafficking/modern slavery, as well as people lacking mental capacity.

I have particular experience in complex appeals before the Special Immigration Appeals Commission ('SIAC'), including representing clients deprived of their British citizenship on grounds of alleged involvement in serious organised crime and in the interests of national security. I have also worked on a number of challenges to government policies regarding the UK asylum system.

My caseload includes:

• Asylum, trafficking and protection claims
• Bail (Immigration Removal Centres)
• Unlawful detention
• False imprisonment
• Deprivation of citizenship
• Removals
• Deportation
• Appeals to the First-tier Tribunal, Upper Tribunal, SIAC, and the Court of Appeal
• Related judicial review matters

I work predominantly on legal aid matters and am accredited as a Senior Caseworker (Immigration and Asylum Law) by the Law Society.

I am committed to the promotion and protection of each client’s fundamental rights and the notion that every person should have access to quality legal representation in such matters.

• LPC with LLM Professional Legal Practice - University of Law (Distinction)
• Graduate Diploma in Law - BPP University (Distinction)
• MSc Politics of Conflict, Rights and Justice - SOAS University of London (Distinction)
• BSc Social Sciences - University of Bath (First Class Honours)

• Duncan Lewis Solicitors (2021 - Present)
• The Death Penalty Project (2018 - 2020)

• "Oskar provided exceptionally professional services and resolved my legal concerns in a very short time". - Asylum Applicant (China) - September 2023.


• "The service provided was of excellent quality [...] a special thank you to our dear lawyer, Oskar Butcher, who became our family and our angel". - Asylum Applicant with Dependent Spouse (El Salvador) - October 2023.


• "I would definitely recommend [Oskar] to others as [his] service and skills were amazing". - Unlawful Detention Claimant (China) - June 2024.


• "Mr. Butcher consistently provided clear and concise explanations of the legal proceedings. He was always attentive and answered all my questions honestly". - Victim of Trafficking (VTS Leave) Applicant (Portugal) - October 2025.


• "I want to thank [Duncan Lewis Solicitors] very much, and I also want to thank the lawyer named Oskar. This lawyer is very respectable and very, very skilled. All thanks and appreciation to you, Mr. Oskar". - Asylum Applicant and Unlawful Detention Claimant (Egypt) - October 2025.

Court of Appeal

• D5, D6, and D7 v Secretary of State for the Home Department [2025] EWCA Civ 957 - Representing D5, D6, and D7 in their appeal to the Court of Appeal from SIAC.

High Court

• D5, D6, and D7 v Secretary of State for the Home Department [SC/176/2020; SC/177/2020; and SC/178/2020] [2023] - Representing two appellants and one applicant before SIAC in their challenges to the Secretary of State's decision to deprive D5 and D6 of their citizenship, and to exclude D7 from the UK, on the grounds of conduciveness to the public good.