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Marian has a wide ranging practice. She is regularly instructed by the prosecution and defence both as junior and leading junior in cases of homicide, complex fraud, serious and historic sexual offences, child cruelty and drugs

conspiracies. Whilst she has been recognised as possessing particular expertise and sensitivity in dealing with

vulnerable witnesses and clients she has successfully represented many professional clients.

Marian lectures regularly on Evidence, Current Legal Developments and Sexual Offences for accredited courses

and seminars provided by The Wales and Chester Circuit and The Law Society. She also assists in providing advocacy training to young practitioners on Circuit.

She is a fluent Welsh speaker and is therefore able and happy to advise and represent clients in this language.



R v C Junior Counsel representing mother charged with attempted murder of 5 year old

daughter – issue insanity

R v F Junior Counsel representing mother charged with murder of her severely disabled son

R v E Junior Counsel representing mother charged with murder of her 7 year old son

R v H - Prosecuting Attempted Murder

Death by Dangerous Driving

R v W Prosecuting Causing Death by Dangerous Driving defence being automatism as a result of

hypoglycemic attack. First successful application by the Prosecution on this circuit for a terminating

ruling from a decision of the trial judge

Serious Violence

R v R Defending father charged with s18 on 3 month old baby causing life threatening injuries - baby shaking

Serious Sexual Offences

R v H Defending mother jointly charged with raping her own children aged under 5 years

R v D Defending woman charged with controlling prostitution and people trafficking

R v T

Defending young man with severe learning difficulties charged with raping a baby and 3 year old boy

R v B Defending professional person charged with historic multiple rapes as part of paedophile ring

R v T Defending primary school headmaster charged with sexual assault on 13 young girls aged

between 5 and 11 years

R v S, S and S Prosecuting high profile case of multiple rapes which had been persistent over many

years by family members on female relative.

R v A Defending high profile case of taxi driver charged with multiple rapes and sexual assaults of

female passengers

R v Z

Leading Junior prosecuting man and woman charged with historic allegations of rape and other

serious sexual offences, vulnerable complainant


R v O’S Junior counsel representing a financial advisor charged 12 others with a multi million pound

mortgage fraud.

R v M Leading Junior representing man charged with multi million pound MTIC Fraud

R v W (Operation Dino) Insurance fraud

R v C Money Laundering

R v O'C & Others Prosecuting fraud on a charity

R v T Prosecuting company director for fraud in care homes

R v H Defending headmistress charged with fraud of school funds

R v W Money Laundering

R v G Money Laundering


(Operation Hallett) Case involved a number of defendants in a national conspiracy to supply

controlled drugs. The defendant was arrested in possession of over 180 kgs of cannabis resin in his

LGV. Although ultimately convicted, applications for the introduction of bad character evidence were

successfully opposed on 2 occasions during the 7 week trial.

R v P (Operation Othello) Leading Junior in defence in conspiracy to Supply Class A drugs

(Operation Verona) Leading Junior in defence in conspiracy to Supply Class A drugs

R v B (Operation Mint) Defending 'second in command' in multi-million pound conspiracy to supply

crack cocaine and other drugs

Care Home Abuse

R v A Defending male nurse charged with cruelty to elderly patients in a care home

Perverting the Course of Justice

R v G Defending retired police officer charged with 13 others with conspiracy to pervert the

course of justice arising from the conviction of three men for the murder of a prostitute in 1988


R v C Prosecuting grandmother charged with kidnapping her own granddaughter and removing her

from the jurisdiction whilst she was a ward of court


R v C Defending multiple armed robberies and conspiracies to rob from Supermarkets, Building

Societies ATMS machines and domestic premises


Sham Marriage

R v H Conducting prosecution of first such offence in England & Wales


‘A stellar barrister.’ (Legal 500, 2018)

'She is a good advocate and has good people skills.' (Chambers UK, 2018)

'A perceptive and intuitive barrister'. (Legal 500, 2017)

'A strong practitioner known to sources for her expert handling of sexual offence cases and for her particular

sensitivity with young or vulnerable witnesses. She has significant experience in a range of serious criminal

cases including homicide, fraud and drug conspiracies. Strengths: "A very safe pair of hands, who is very,

very cool and unflustered. She has good people skills and is a good advocate."' (Chambers UK, 2017)

'She immediately understands the important issues in a case, and is very persuasive in front of a jury'.

(Legal 500, 2016)

'A well-regarded practitioner who is highlighted for her work on serious criminal cases such as sexual

offences, homicide and child cruelty. She is particularly skilled in handling cases with young or vulnerable

clients.' "She is very experienced and develops a good rapport with clients. She is always well briefed and

extremely conscientious." (Chambers UK, 2016)

'Able to cut to the chase, wade through a mountain of paperwork, and identify the key issues' (Legal 500,


'Handles the full range of criminal law matters for the prosecution and the defence. She regularly acts on

serious sex offence cases and is recommended for her expertise in dealing with vulnerable individuals. "She

is always very personable with the clients. She is competent and capable, and has a lot of expertise." "She

is an excellent advocate who has good rapport with clients." (Chambers UK, 2015)

'A well-regarded senior junior who is highly skilled at representing vulnerable witnesses' (Legal 500, 2014)

'Marian Lewis is held in high regard for her considerable knowledge of numerous criminal law issues.

Interviewees describe her as "client-oriented and technically brilliant." Her practice includes robbery, murder

and death by dangerous driving cases.' (Chambers UK, 2013)

'Marian Lewis has a quality practice that includes serious sex cases and murders, which she handles with

"great sensitivity and skill"'. (Chambers UK, 2012)

'Marian Lewis is an experienced performer who “stands up well in the crucible of the courtroom”’ (Chambers

UK, 2008)

'…strong juniors including Marian Lewis for serious crime…’ Legal 500 2007)

' ...a faultless performer, pinpointed for her involvement in serious violent and sexual offences’ (Chambers

and Partners Guide, 2006)

Marian Lewis

Marian Lewis



Death by dangerous driving

Serious violence

Serious sexual offences



Care Home Abuse

Perverting the Course of Justice



Sham Marriage


Member of the panel counsel for the National Assembly for Wales

VHCC Panel Member

Grade 4 Prosecutor (Rape Panel)


Criminal Bar Association

For any enquiries, please contact the clerking team:


Phone: 02920 23 2032

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