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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Successful appeal against order for possession brought on grounds of alleged trespass

Tim Baldwin represented the appellant, Ms Gonzalez Alcaron, on 30 July 2026 in an appeal against a possession order made in August 2025 in her absence. This appeal falls under a series of cases at Holtsfield near Swansea in South Wales. See previous coverage of proceedings concerning the site. Mr Gonzales Alcaron has sought to […]

Friday 7 Aug 2026

High Court confirms councils cannot avoid care-leaver duties by “mislabelling” s.20 accommodation as s.17 assistance

The claimant was represented by Gráinne Mellon and Georgie Rea, instructed by Deighton Pierce Glynn.  

Thursday 6 Aug 2026

High Court quashes disabled 10-year-old child’s permanent exclusion from school

Ollie Persey and Rosa Thomas of Garden Court Chambers’ Education Law Team appeared for the successful Claimant. They were instructed by Duncan Lewis Solicitors.

Wednesday 5 Aug 2026

Lucie Wibberley secures third firearms acquittal of the year

Lucie Wibberley, of the Garden Court Crime Team, was instructed by Veli Avdji of BSB Solicitors in her third successful firearms acquittal case this year.

Wednesday 5 Aug 2026

Supreme Court grants permission to appeal Palestine Action terrorism proscription

Owen Greenhall and Audrey Cherryl Mogan of the Garden Court Protest Team, act as junior counsel on the legal team for Huda Ammori, a co-founder of Palestine Action.

Friday 31 Jul 2026

Adrian Berry KC secures immigration civil penalty appeal win against Home Office for care provider

Adrian Berry KC, instructed by Hempsons, represented the successful appellant, Creative Support Limited, in a Civil Penalty appeal against the Home Secretary.

Friday 31 Jul 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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