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Gerwyn Wise

Year of Call: 2010

"First choice when instructing counsel when a certificate has been granted in the youth court."

Legal 500, 2020

"Gerwyn is an extremely impressive advocate who is able to deploy a high level of expertise when representing clients. He works tirelessly but with remarkable efficiency in every case, ensuring that he has the complete trust of those he represents."

Adrienne Wright, TV Edwards Solicitors

"Gerwyn quickly wins over clients with his charm. His diligent preparation means that his punchy persuasive submissions are always on point and absorbed by those who need to be swayed."

Legal 500, 2021 (Crime)


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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Gerwyn is a specialist criminal defence barrister with experience defending in a range of cases including serious violence, organised crime, sexual offences and fraud and confiscation.

Criminal Defence


Gerwyn is a criminal defence barrister specialising in cases of serious violence, organised crime, sexual offences and fraud and confiscation. He has been instructed in a number of complex and high profile cases in recent years.

An extremely capable and personable advocate, Gerwyn has extensive experience representing young and vulnerable clients charged with grave crimes.

Notable Cases

Serious violence


Client acquitted of male model murder (Operation Panhandle)
R v JO, Central Criminal Court (2018)
Led by Kieran Vaughan QC in the trial of three defendants charged with the high profile murder of male model Harry Uzoka. The client was the only defendant acquitted of murder but convicted of manslaughter. The case was covered extensively in the national media including BBC.

Acid attack by gang seeking revenge on two music producers (Operation Silverfox)
R v WD and others, Snaresbrook Crown Court (2018)
The trial followed a police investigation and manhunt covered in the national media including BBC. The client was one of four defendants charged with offences arising out of gang related acid attack on two music producers.

Thirteen year old gang leader stabs junior school rival
R v SS and others, Luton Crown Court (2018)
The thirteen year old client was charged with five others of GBH with intent and violent disorder following the stabbing of a former junior school rival. The trial judge subsequently referred to the case in his nationally reported retirement speech in support of his campaign for the introduction of blunt edged knives. Covered by Telegraph.  

Acquittal following exclusion of gang affiliation evidence (Operation Diryu)
R v AC and another, Central Criminal Court (2017)
The client was accused with others of being part of a gang responsible for attacking a fourteen year old rival gang member with Rambo style knives. Following successful submissions to exclude YouTube ‘drill’ music videos the client was acquitted by the jury of attempted murder. CCTV of the incident was covered in the national media including Daily Mail.

Prosecution arising out of the protests following the death of Rashan Charles (Operation Falmer)
R v AT and others, Wood Green Crown Court (2017)
The client was charged with others of violent disorder arising out of his involvement in the Hackney protests against the police following the death of Rashan Charles.

Prosecution offer no evidence rather than comply with disclosure obligations (Operation Horn)
R v RW and others, Canterbury Crown Court (2017)
The client was charged with others of a conspiracy to kidnap and serious assault on the partner of a rival gang leader. The prosecution was forced to offer no evidence rather than disclose defence requested sensitive material relating to the wider police investigation. 

Acquittal despite the presence of unexplained DNA at the scene 
R v SK, Woolwich Crown Court (2017)
The client was acquitted of aggravated burglary despite his unexplained DNA having been found on the inside of the window used by a gang when breaking into the property.  

Successful submission of no case in gang murder trial following Jogee (Operation Lebberston)
R v SK and others, Central Criminal Court (2016)
Led by Martin Heslop QC in the trial of six defendants charged with murdering a rival gang leader. The client was acquitted after a successful submission of no case to answer. This was the first murder trial to apply the Supreme Court decision in Jogee on joint enterprise. Covered by Telegraph.

Favourable basis of plea negotiated on behalf of teenage girl charged with attempted murder
R v FP and another, Kingston Crown Court (2016)
The client was a teenage girl initially charged with attempted murder having deliberately driven into two police officers in an attempt to escape arrest. She subsequently pleaded guilty to a reduced charge of ABH with a favourable basis of plea and was given a suspended sentence. 

Organised crime

Prosecution offer no evidence in slavery case following defence submissions (Operation Cadet)
R v DP and others, Bournemouth Crown Court (2018)
Led by Warwick Aleeson in a case representing one of three defendants accused of holding four vulnerable individuals in servitude for over a decade. The client was assessed as unfit to stand trial and following defence submissions the prosecution offered no evidence. 

Conspiracy to blackmail a high profile businessman (Operation Zonal)
R v NA and others, Caernarfon Crown Court (2018)
Instructed to represent an alleged London gang member charged with six others of conspiracy to blackmail a high profile businessman in North Wales.

Prosecution offer no evidence following defence submissions on admissibility of gang affiliation evidence
R v TH, Camberwell Green Youth Court (2018)
Instructed under certificate of counsel to represent a sixteen year old client alleged to be a high ranking member of a South London gang involved in the trafficking of teenage boys. The prosecution offered no evidence following defence submissions on the admissibility of gang evidence.

Acquittal following defence submissions to exclude confession
R v RS and another (2018)
Successful application to exclude an improperly obtained confession upon arrest. The client was subsequently found not guilty by the jury.  

London gang involved in county lines operation in Essex (Operation Saturn)
R v SR and others, Chelmsford Crown Court (2017)
The client was one of seven members of the London based ‘Jay Boys’ gang involved in a county lines conspiracy to supply class A drugs in Essex.

Conspiracy to smuggle drugs and mobiles into prisons (Operation Rabbit)
R v BC and others, Southampton Crown Court (2017)
While serving a life sentence for murder the client was charged as the ringleader of an eight handed conspiracy to convey both class A drugs and mobiles into prison.

Prosecution of gangs involved in human trafficking (Operation Herschel)
R v KS and others, Southwark Crown Court (2015)
Led by Roderick Price in a seven handed trial arising out of an investigation by the Metropolitan Police Kidnap and Trafficking Unit into people trafficking into the UK.

Sexual offences

Erectile dysfunction and the effects of cocaine in a case of attempted murder and rape of an elderly female (Operation Backpack)
R v ZE, Leicester Crown Court (2019)
Led by Jason Bartfeld QC in the trial of a young defendant charged with the attempted murder and rape of an elderly female left with life changing injuries. The case raised novel points of law on the admissibility of expert evidence relating to erectile dysfunction caused by cocaine use. The case was covered extensively in the national media including Independent

Prosecution offer no evidence after defence request for disclosure of the complainant’s mobile telephone 
R v PT, Inner London Crown Court (2018)
The client was charged with three allegations of rape. Following defence requests made in advance of trial in relation to the disclosure of the complainant’s mobile telephone, the prosecution offered no evidence. 

Youth acquitted of sexual assault on a teenage girl
R v KP, Chelmsford Youth Court (2018)
Instructed under certificate of counsel to represent a sixteen year old client accused of dragging a thirteen year old girl into an underpass and sexually assaulting her by placing his hands on her vagina. The case was dismissed at the end of the prosecution evidence after a number of fundamental inconsistencies were exposed during cross-examination of the complainant and her mother.

Sexual assault of two nine year old girls by client suffering with paranoid schizophrenia 
R v SM, Croydon Magistrates’ Court (2018)
Instructed under certificate of counsel to represent a client suffering with paranoid schizophrenia. Having recently been convicted of sexually assaulting a seventy nine year old woman, the client was charged with committing the same offence against two girls aged nine years old. Following cross-examination of the two complainants and three further witnesses aged eleven years old, the client was found not guilty of the most serious allegation. 

Determinate sentence for multiple grooming and sexual assault offences
R v SH, St Albans Crown Court (2017)
Determinate sentence imposed on a client convicted of multiple grooming and sexual assault offences on two children under the age of thirteen. 

Favourable basis of plea limits length of inevitable prison sentence
R v JBH, St Albans Crown Court (2017)
The eighteen year old client was originally arrested for rape of his fourteen year old girlfriend. Despite evidence that the complainant had been threatened into having sexual intercourse by the client, a favourable basis of plea to the lesser charge of sexual activity with a child was accepted and the inevitable custodial sentence was limited to 12 months imprisonment.

Vulnerable client charged with historic child sex offences
R v LC, Chelmsford Crown Court (2016)
Led by Sasha Bailey in the trial of a client charged with twenty three allegations of rape or attempted rape in relation to six teenage boys. The vulnerable client was assisted throughout the six week trial by an intermediary.

Contact Gerwyn

Financial Crime and Confiscation


Gerwyn has experience as junior alone and led junior defending clients charged with high value fraud offences, breach of consumer protection legislation, VAT evasion and other white-collar crime. This extends to representation of individuals in subsequent confiscation and enforcement proceedings. 

Notable Cases

Conspiracy to launder the proceeds of stolen high value agricultural machinery (Operation Merseyside)
R v CG and others, Isleworth Crown Court (2019)
Led by Avi Chaudhuri in a trial arising out of a multi-year investigation carried out by specialist police unit the Plant and Agricultural Intelligence Unit (PANIU). The client was one of five defendants charged with conspiracy to launder the proceeds arising out of the sale of stolen agricultural machinery valued in excess of £1million. 

City worker given suspended sentence for £270,000 fraud
R v DH, Central Criminal Court (2018)
Instructed to represent a city worker responsible for defrauding his employer out of £270,000 of client funds. Having heard lengthy submissions on behalf of the vulnerable client, the judge agreed to suspend the inevitable custodial sentence. The client was also represented in the subsequent confiscation proceedings. The case was covered in the national media including Daily Mail.

Director of building company given suspended sentence for £140,000 fraud
R v MD and others, Ipswich Crown Court (2017)
The client was the director of a building company prosecuted by Trading Standards for a £140,000 fraud and breach of consumer protection legislation involving vulnerable pensioners. The judge was persuaded to suspend the prison sentence given the client’s young age and previous good character.

Contact Gerwyn


Gerwyn previously worked as a legal consultant specialising in Welsh devolution. He was regularly instructed by The Law Society’s Wales Committee to prepare legislation monitoring reports and undertook seminars attended by both legal professionals and members of the National Assembly for Wales. 

From August 2010 to August 2011, Gerwyn worked with public law specialist Katherine Apps on various matters including the Supreme Court case of R (on the application of G) v X School. He was also part of Caroline Harry Thomas QC’s team instructed by the Official Solicitor in W (brought by her litigation friend B) v M, which concerned the first application ever made to withhold and withdraw artificial nutrition and hydration from a person in a minimally conscious state. 

Immediately prior to joining the Bar, Gerwyn was employed as a criminal defence paralegal at Hickman and Rose Solicitors. While there he worked on a number of complex cases involving allegations of serious violence, financial crime and extradition.  

Training and Seminars

Gerwyn regularly provides in-house training for solicitors on various topics of criminal law, evidence and procedure.  

On 21 May 2019 Gerwyn gave live evidence in front of the House of Commons Justice Committee considering court and tribunal reform.


Florida Advocacy Course Scholarship, South Eastern Circuit (2015)
Thomson Reuters Award, Criminal Bar Association (2014)
Ann Felicity Goddard Award, Honourable Society of Gray’s Inn (2013)
Denise Pannick Award, Honourable Society of Gray’s Inn (2009)


Bar Vocational Course (Outstanding)
Cardiff University LLB

Professional Membership

Young Barristers' Committee (member and representative on the Transforming Summary Justice Group)
Criminal Bar Association (current Assistant Secretary)
Stonewall Ambassador

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