Diana Ellis QC > Chambers of P Mendelle QC, G Carter-Stephenson QC & J Dein QC > London, England > Lawyer Profile

Chambers of P Mendelle QC, G Carter-Stephenson QC & J Dein QC
25 Bedford Row

Living Wage


Hugely  experienced and committed criminal defence barrister with a substantial criminal domestic practice  and an international humanitarian law practice. Specialises in the most serious criminal offences: murder, armed robbery, sexual abuse, fraud, slavery and extradition. Extensive experience in International Criminal and Humanitarian Law and during the last 20 years has worked in a number of international courts and has led defence teams in cases of genocide, crimes against humanity and war crimes cases.

Extradition and international mutual legal assistance, representing individuals. She regularly works with lawyers outside the UK on national and international criminal cases assisting with strategy and legal challenges. .  

Domestic experience includes handling serious criminal cases at both trial & appellate level including fraud and conspiracy, homicide offences, organised crime including drug trafficking and armed robbery, sexual offences and the most serious child abuse cases.  Diana Ellis is praised for her sensitivity and expert handling of vulnerable witnesses.


Called 1978, Silk 2001 Appointed Recorder of the Crown Court 1998.


French (working knowledge).


  • UN Appointed Counsel for ICTR.
  • Authorised counsel for International Criminal Court.
  • Member of the Cambodian Bar May (2008)
  • Admitted as counsel to the Kosovo Specialist Chamber
  • Criminal Bar Association
  • European Criminal Bar Association
  • International Bar Association
  • Liberty
  • Bar Pro-Bono Unit
  • Kurdish Human Rights Project


London University (LLB Hons); London School of Economics (Dip Soc Admin).

Lawyer Rankings

London Bar > Crime

(Leading Silks) Ranked: Tier 2

Diana Ellis QC25 Bedford RowDiana is an excellent advocate and brilliant lawyer. Her potent advocacy is a delight, sounding spontaneous yet honed by rigorous preparation.

25 Bedford Row is ‘unrivalled as a criminal defence set‘, housing ‘counsel with vast talent‘ and a track record of handling prominent publicly-funded cases, alongside a range of privately funded matters. In a recent highlight for the set, Diana Ellis QC, Adrian Eissa QC and Lisa Wilson defended a family charged with manslaughter, false imprisonment, and causing the death of a vulnerable adult, who died after being restrained and undergoing an exorcism; the family was acquitted of all charges. In recent chambers news, Melanie Simpson QC was elevated to silk in March 2020.

London Bar > International crime and extradition

(Leading Silks) Ranked: Tier 2

Diana Ellis QC25 Bedford RowShe is an excellent advocate and brilliant lawyer. She is master of all the material in the cases in which she is instructed. Her knowledge of practice and procedure in international tribunals is second to none.

25 Bedford Row ‘has a number of practitioners with special expertise in international criminal law‘, including ‘impressive advocate‘ David Hooper QC who is representing Augustin Ngirabatware (the former Minister of Planning in Rwanda) in a trial relating to alleged interference with protected witnesses and contempt during an appeal concerning the client’s convictions for involvement in the 1994 Rwandan genocide. Also of note, Diana Ellis QC is highlighted for her ‘knowledge of practice and procedure in international tribunals is second to none‘, while Sam Blom-Cooper is ‘an excellent, original-thinking lawyer and a highly persuasive advocate‘.

London Bar > Civil liberties and human rights (including actions against the police)

(Leading Silks) Ranked: Tier 4

Diana Ellis QC25 Bedford RowTenacious and has vast knowledge on international criminal law.