Graeme is widely recognised for acting in some of the most significant extradition and INTERPOL cases before the courts. His practice has a particular emphasis on allegations of fraud, corruption and money laundering, and he is frequently instructed in matters carrying substantial reputational, political and international dimensions. 

His clients have included prominent businesspeople and high-net-worth individuals facing proceedings in multiple jurisdictions, among them Mehul Choksi, Nirav Modi, Oleksandr Hranovskyi, Paulus Tannos, Joseph Lau and Andrew Bennett. 

The appellate dimension of his practice includes appearances in major Supreme Court authorities. In Bertino v Italy, he appeared in a landmark case that reshaped the approach to "deliberate absence" and strengthened protections for requested persons. He also appeared in Romania v Popoviciu, which clarified the approach to extradition where allegations of corruption undermine the fairness of judicial proceedings. 

Over the course of his career, Graeme has successfully resisted extradition requests concerning allegations ranging from homicide, infanticide and serious sexual offences to large-scale drug trafficking, human trafficking and complex financial crime. His work regularly extends beyond domestic proceedings to related constitutional litigation, international human rights challenges and proceedings before international tribunals. 

Graeme maintains a substantial criminal appeals practice in both domestic and international courts. He is particularly known for cases involving miscarriages of justice, fresh evidence, constitutional rights and death penalty litigation. 

His commitment to human rights work was recognised by Advocate's International Pro Bono Barrister of the Year 2026, reflecting a longstanding involvement in abolitionist litigation and strategic challenges concerning capital punishment. Working closely with the Death Penalty Project, he is instructed in matters arising across Asia, Africa and the Caribbean. 

Recent domestic work includes representing a significant number of sub-postmasters and sub-postmistresses affected by the Post Office Horizon scandal, as well as advising on appeals concerning Imprisonment for Public Protection (IPP) sentences. 

Before the Privy Council, he has appeared in a series of important appellate cases. These include Lescene Edwards, whose murder conviction was quashed following findings that he was innocent, and Uriah Woods, whose successful appeal based on fresh psychiatric evidence produced an important authority concerning diminished responsibility and clarified the law on provocation.

A distinctive feature of Graeme's practice is the conduct of litigation that combines constitutional, public law and human rights principles across multiple jurisdictions. He is regularly instructed where domestic proceedings have significant international consequences or where questions of state accountability arise. 

Recent instructions have included:

• Proceedings before the Caribbean Court of Justice concerning the constitutionality of intercepted communications relied upon in support of an extradition request.
• A constitutional challenge in Belize concerning proposed revocation of citizenship.
• Ongoing constitutional proceedings in Antigua and Barbuda seeking an effective investigation into allegations of kidnapping and torture.
• Claims arising from allegations of malicious prosecution and misfeasance in public office in Dominica.
• Constitutional litigation in Singapore arising from an extradition request from Indonesia.
• A challenge in Hong Kong concerning legislation that would have permitted extradition to mainland China.
• Proceedings in the British Virgin Islands concerning allegations of money laundering. 

Graeme is also a founding member of the Centre for Human Rights International (CEHRI), which conducts strategic litigation concerning torture, war crimes and other serious human rights abuses. The organisation's work includes projects funded by international institutions and NGOs aimed at securing accountability for victims of grave abuses. 

His international practice encompasses appearances before the European Court of Human Rights, the UN Human Rights Committee, the UN Working Group on Arbitrary Detention, the UN Special Rapporteur on Torture and INTERPOL. 

Graeme is regularly instructed in public law matters that arise from criminal investigations, extradition proceedings and state decision-making. His experience extends from judicial review and constitutional litigation to claims involving state liability and abuse of power. 

Recent successes include:

• Overturning a district judge's decision dismissing challenges to extradition where procedural unfairness had occurred.
• Setting aside a youth court conviction arising from inappropriate charging decisions and unfair procedure.
• Securing access to appropriate medical treatment for a serving prisoner.
• Persuading the National Crime Agency to reverse its refusal to investigate allegations of kidnapping and torture. 

He is currently instructed in high-profile civil proceedings involving allegations of unlawful means conspiracy against a foreign state, raising issues including state immunity, forum non conveniens and security for costs.