Mary McKeone

Year of Call: 1986

"Recommended for serious and violent sexual offences."

Legal 500 2012

"Mary McKeone's practice spans all areas of serious crime"

Legal 500 2011

"Mary McKeone is a 'very combative trial advocate'"

Legal 500 2010

Contact

To get in touch:​ Or you can contact the relevant​ Practice Team Clerks directly and they will be happy to assist with your enquiry.

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Mary McKeone is a leading criminal defence barrister with considerable experience in serious violent and sexual offences. Her practice includes all areas of civil actions against the police. She is particularly interested in cases which uphold prisoners' rights and challenge accepted principles.

Mary is also a tenant at Garden Court North Chambers

Criminal Defence

Overview

Mary is a leading criminal defence practitioner with considerable experience in serious violent and sexual offences. She undertakes the full range of work including murder, manslaughter, GBH and 'gangland' cases, large-scale drug conspiracies, large-scale public order offences, conspiracy to incite criminal damage, serious fraud and offences under the Immigration Acts.

She has also appeared in a number of high-profile cases including an IRA conspiracy to cause explosions in 1997 and the 2010 case of Hannah McIntyre, the teacher cleared of having sex with a pupil.

Notable Cases

R v Kathryn Roach (Bolton Crown Court 2011) – teacher charged with sending sexually explicit text messages to a school boy. This case was reported by the Manchester Evening News and by the BBC

R v M (Sheffield Crown Court, 2011) – rape – allegations of sexual abuse by three of defendant's five daughters – acquittal of all seventeen counts on the indictment.

Represented Hannah McIntyre, a Classics teacher at Merchant Taylor School in Liverpool, who was charged with having sexual intercourse with a pupil who at the time was 16 years old (2010)

R v Troiano (Warrington Crown Court, 2010) – teacher found not guilty of allegations of causing or enticing sexual activity with 16 year old in a classroom. This case was reported in the local media.

Junior counsel representing a juvenile who was charged with three murders and one attempted murder (2009)

Defending community police officer charged with misconduct (2009)

Appeal in relation to credit on demand (2009)

A five-handed case involving three armed robberies (2009)

Rapes and sexual assaults, some of which have involved a number of teachers (ongoing)

Judicial review (prison law adjudication) (2009)

Firearms with mental health issues (2008)

17-year-old charged alongside her mother with conspiracy to import 7kg of cocaine (2006)

Appeared for girlfriend charged with perverting the course of justice in Narel Sharpe murder case (2006) This case was reported by the BBC.

Leading defence junior in lengthy money laundering trial (several £million) (2005)

Leading junior in kidnapping and false imprisonment case (2004)

Represented a member of "Pitt Bull crew" for conspiracy to supply Class A drugs and conspiracy to possess firearms with intent to endanger life – three-month trial and subsequent gangland murder trial (2002)

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Prisoners’ Rights

Overview

Mary is particularly interested in cases which uphold prisoners' rights and challenge accepted principles. Over the past 18 months Mary has developed her prison law practice substantially particularly in the area of parole board hearings and judicial review. She undertakes all aspects of prison law work including adjudications, Parole Board hearings and Lifer Panels and judicial review relating to prison law.

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Claims Against the Police and Public Authorities

Overview

Mary recently extended her practice to include all areas of civil actions against the police, which complement her criminal practice. She has a particular interest in cases involving false imprisonment, malicious prosecution and wrongful arrest.

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James Holmes shortlisted for Junior Barrister of the Year at Family Law Awards 2026

Garden Court congratulates James Holmes who has been shortlisted for Family Law Junior Barrister of the Year at the LexisNexis Family Law Awards 2026.

Friday 28 Aug 2026

Garden Court shortlisted at Chambers Bar DEI and Pro Bono Awards 2026

We are delighted to announce that we have been shortlisted at the Chambers UK Bar DEI and Pro Bono Awards 2026.

Wednesday 26 Aug 2026

Shanice Mahmud secures unanimous acquittal in armed robbery trial at Maidstone Crown Court

Shanice Mahmud, of the Garden Court Crime Team, represented the defendant, DS. Shanice was ably assisted throughout proceedings by Sashon Samuels of Dexter Henry Solicitors. 

Monday 24 Aug 2026

Cranston Inquiry recommendations accepted in Government interim response

The Inquiry would not have taken place without the efforts of the families of the bereaved and the survivor. Several Garden Court barristers were instructed in the Cranston Inquiry on their behalf, including Sonali Naik KC, Nadia O’Mara, Alex Schymyck and Sophie Lucas.

Friday 21 Aug 2026

Palestine Action ‘Barclays five’ activists will not be sentenced as terrorists

Audrey Cherryl Mogan of the Garden Court Protest Rights Team acted for one of the ‘Barclays Five’ at Preston Crown Court.

Friday 21 Aug 2026

Defendant acquitted following lengthy cryptocurrency extortion trial alleging kidnap

Sam Robinson KC of Garden Court led Dan Taylor of Red Lion Chambers, instructed by Shabaz Ahmed of Edwards Duthie Shamash Solicitors.

Thursday 13 Aug 2026

Background

Previously, Mary worked at Liberty as a Research Assistant.

Mary has worked on a voluntary basis for the Irish Council of Civil Liberties and the Irish Commission for Prisoners Overseas. She prepared a preliminary report for the Irish Law Society on the use of Public Defenders. She has also been a member of the Management Committee of British Irish Rights Watch, a non-governmental human rights organisation and registered charity, which monitors the human rights dimension of the conflict and peace process in Northern Ireland. Mary represented BIRW at the United Nations Commission for Human Rights, in Geneva.

Education

  • LLB (Hons)

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