On 1 April 2021 Andrew was appointed by the Attorney General to be the Chief Inspector of Her Majesty’s Crown Prosecution Service Inspectorate (HMCPSI).

From 2013 to 2020 Andrew was the Director of Service Prosecutions, the United Kingdom’s most senior military prosecutor.

In 2009 he was appointed the Chief International Co-Prosecutor of the Extraordinary Chambers in the Courts of Cambodia, the Khmer Rouge Tribunal, by the Secretary General of the United Nations.

From 2007 to 2009 he defended Charles Taylor, the former President of Liberia, before the Special Court for Sierra Leone and Ivan Cermak before the International Criminal Tribunal for the former Yugoslavia (ICTY).

Andrew is currently unavailable to accept instructions.


Appointed by HM Queen as Companion of the Most Distinguished Order of St Michael and St George for services to international criminal law and human rights in the 2014 Birthday Honours List.


LL.M ( University College London) 1989



Prosecutor vs Ieng Sary, Nuon Chea & Ors (Case 002/01)

The second t trial (Case 002/01) commenced on 21 November 2011, primarily focusing on alleged crimes against humanity related to the forced movement of the population from Phnom Penh and later from other regions, and execution of Khmer Republic soldiers at Toul Po Chrey execution site immediately after the Khmer Rouge takeover in 1975. It also considers the roles of the Accused in relation to regime policies relevant to all charges, which will provide a foundation for examining the remaining charges in future trials. On 7 August 2014, the Trial Chamber found Nuon Chea and Khieu Samphan were found guilty of crimes against humanity and sentenced to life imprisonment.

Andrew Cayley CMG QC to speak at Chatham House Event – Investigating Violations of International Humanitarian Law

6th January 2020

This event, which will be introduced by the director of the UK Service Prosecuting Authority, Andrew Cayley, will discuss the new report by the International Committee of the Red Cross and the Geneva Academy of International Humanitarian Law, Guidelines on Investigating Violations of International Humanitarian Law: Law, Policy and Good Practice, as well as the problems and challenges associated with recording civilian casualties of armed conflict.

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Investigations into terrorism and allegations of war crimes

6th July 2017

Andrew Cayley CMG QC and Rodney Dixon QC have been in Lagos, Nigeria meeting with Nigerian military prosecutors and investigators in connection with national investigations into terrorism and allegations of war crimes arising from the conflict with Boko Haram in Nigeria. The meetings were organised under the auspices of the Wayamo Foundation, and addressed key aspects of international humanitarian and criminal law and best practices for the investigation and prosecution of international crimes.

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Andrew Cayley QC, Rodney Dixon QC and Emily Wilsdon are this week in Mexico City

22nd November 2016

Andrew, Rodney and Emily will participate in a week of discussions with the Mexican Armed Forces on International Humanitarian Law and International Criminal Law, an event which has been organised by Foro de Justicia International AC and its chief executive Professor Dr. Mónica Rocha-Herrera.