Profile
Work Department
Position
In the past two years Mary has secured the acquittal of the youngest person in the United Kingdom to be accused of terrorism. She represented the stepmother of Arthur Labinjo Hughes at her trial for murder and cruelty and successfully argued at the Court of Appeal that her sentence was not unduly lenient. She secured the acquittal of the alleged leader of a significant organised crime group who was said to run the sale and supply of drugs and firearms in the Coventry area of the Midlands by violence and threats. She secured the conviction on retrial of Emma Magson and the conviction of John Jefferies who killed two young men in revenge for damaging his car. She is currently instructed to prosecute two horrific murders of 10 month old babies in the Derbyshire area.
Mary Prior KC has a reputation for being a powerful, persuasive advocate who commands the respect of the court room and gets results. She has especial expertise with the vulnerable including people on the autistic spectrum, with ADHD, learning difficulties, addictions, sex workers, those in the “looked-after” system. She is regularly instructed to prosecute and defend cases where the key witnesses are vulnerable (children/special needs). Mary takes highly complex factual and legal cases and presents them in a simple manner to ensure everyone understands the issues. She takes great care to ensure that all relevant material is considered and utilised. When prosecuting, she gains the trust of the families of the deceased and works well as part of a team of officers and lawyers. When defending she regularly visits her clients, gains their trust and determines a focussed trial strategy. Mary is fearless when cross-examining those who require a robust approach. She ensures that the best points in a case are not lost by focus on irrelevancies. She prosecutes and defends in equal measure in the best traditions of the independent Bar. She provides early and thorough written advice and strategy as to the best approach. She is often commended by Judges for her handling of cases and of witnesses.
She is often instructed in murders of children involving complex medical evidence, homicides by groups of young people, homicides with a history of domestic violence, all homicides, organised crime groups using firearms and violence to distribute drugs on a massive scale. She is instructed in multi-defendant and complainant historic sexual offences which involve the control of people, slavery and sexual exploitation.
She was called to the Bar in 1990 and has over 30 years experience as a criminal barrister.
TIER ONE LEADING SILK MIDLAND CIRCUIT LEGAL 500
WOMAN OF THE YEAR 2020 WOMEN IN THE LAW UK
FINALIST FOR LEADING SILK OF THE YEAR 2019 LEGAL 500
RECORDER IN CRIME
RECORDER IN FAMILY
Work undertaken:
Terrorism
Organised crime groups
Homicide – death of children
Homicide – history of domestic violence
Homicide - youths
Rape and serious sexual offences and historical sexual offences
Large scale child sexual exploitation
Institutionalised child sexual abuse
Large scale conspiracies to import drugs
Work which crosses family and criminal law - arson, child abduction, homicide, cruelty.
Career
Called 1990; Gray’s Inn; Silk: 2017.
Publications:
Quarterly RASSO newsletter Midland Circuit.
Academic papers on memory and intoxication, interview techniques for inebriated witnesses.
Chapter for special measures in Human Trafficking and Modern Slavery
Flowe, H., Carline, A., Takarangi, M., Humphries, J., French, S., & Prior, M. (2015). Sexual violence and complainant intoxication. Criminal Justice & Law Weekly, 179 (34).
Contributor to Alcohol and Remembering Rape - New Evidence for Practice Palgrave McMillan.
Memberships
Education
Anglia Ruskin University (LLB (Hons)); Inns of Court School of Law (BVC (Very Competent)).
Content supplied by The 36 Group
Testimonials
Collated independently by Legal 500 research team.
- 'Jack Curtis stands out for his calm efficiency and willingness to get the best result possible. Daisy Parsons and Lewis Collier are long-term diary planners, seamlessly resolving diary management issues with pinpoint accuracy.'
- 'The clerks are exceptionally efficient and informative. Jack Curtis, Elliot Styles, Daisy Parsons and Lewis Collier do everything they can to assist and, with crystal balls in hand, predict difficult situations, take control and fix it.'
- 'The clerks are always helpful and honest. Elliot Styles goes out of his way to help with difficult situations.'
- 'Jack Curtis stands out for his extensive next-day diary management skills, and you know your case is in safe hands when managed by Daisy Parsons and Lewis Collier.'
- 'The 36 Group has a strong reputation in the legal field.'
- 'The 36 Group is a powerhouse in crime.'
- 'The 36 Group is an excellent set of chambers, displaying strength and depth at all levels.'
- 'The 36 Group is an exceptional set of barristers who are all first class.'

