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Mark Gatley

Year of Call: 1993

"An exceptional advocate with a nice courtroom manner. He is well prepared and just a pleasure to deal with."

Chambers UK, 2021 (Crime)

"Analytical. Tactically acute. Hardworking and very proactive and user friendly in assisting solicitors in very complex cases."

Legal 500, 2021 (Crime)

"Very bright, and a strong advocate."

Legal 500 2020

"He handles complex organised crime and sex offence cases."

Legal 500 2017 (Crime)

"A hugely capable barrister with very strong all-round knowledge" "Defends in complex and challenging matters"

Legal 500


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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Legal 500 2022: Leading Junior

Mark is an accomplished and highly regarded senior junior with a heavyweight criminal defence practice, specialising in serious and organised crime, and regularly acting for private clients. He has a reputation for combining impressive courtroom skills with an easy manner; for tactical acuity and thorough preparation.

Criminal Defence


Mark is an accomplished and highly regarded senior junior with a heavyweight criminal defence practice, specialising in serious and organised crime. He has a well-deserved reputation for the quality of his advocacy and his ability to win-over juries in the most difficult of cases.

Notable Cases

Sexual Offences

R v Mann
Defending a man charged with sexual activity with a person with a mental disorder impeding choice. The defendant fled the country during the prosecution case and was tried in his absence. Acquitted.

R v B
A rape trial at the Old Bailey which collapsed after the complainant admitted during cross-examination that she had fabricated allegations of multiple rape.

R v N
Child sexual exploitation case in Oxford (Operation Kingfisher), involving multiple counts of sexual offences against vulnerable children, including gang rape. Expert cross-examination required of numerous child witnesses including an autistic teen-age complainant. Only defendant acquitted after cut-throat defence with several co-defendants. This case was reported by the BBC and the Daily Mail.

R v J
Successful defence of a man accused of raping a hearing impaired cerebral palsy sufferer, who could neither speak nor sign. Defendant was a stranger to her, and ran consent.


R v McCaffery & Others
Leading junior in the defence of a principal defendant accused of corrupting a solicitor's clerk in order to gather information on a police investigation into a substantial drugs conspiracy in Manchester and the North East. Acquitted. This case was reported by Manchester Evening News.

R v Schoon & Others
Defending the principal defendant in the Dutch Ambulance drug conspiracy, involving drugs worth in excess of £1.6 billion: one of the largest drug conspiracies in English legal history. This case was reported by The Telegraph, the Guardian and Sky News.

R v Alvarez
Defence of a Columbian with Cali Cartel connections accused of involvement in a conspiracy to import five tonnes of cocaine.


R v M & Others
Defending a juvenile accused of being the getaway driver for the murderers of the busker Paul Pass in Gloucester. Acquitted. This case was reported by the BBC, Sun, Daily Mail and Mirror.

R v Aurangzaib & Others
Defendant charged with conspiracy to rob on an indictment alleging murder; the victim having been shot dead during to course of a botched robbery. Acquitted following a successful submission of no case to answer. This case was reported by the BBC.

R v Norris
The Stephen Lawrence murder, through which Mark gained a particular interest in hair and fibre analysis. This case was reported globally. See for example reports by the BBC, the Daily Mail and the The Washington Post.

R v Curran & Others
"Headless Corpse" case, involving a meticulously planned gangland abduction, murder and dismemberment. Acquitted. This case was reported by the BBC.

R v H
Defendant acquitted of attempted murder, having stabbed the complainant in the heart. H was found to be suffering from PTSD and psychiatric evidence was admitted as to the impact of his condition on issue of reasonable force.


R v Bailey
For first defendant in a gangland firearms case. Acquitted at half time following successful challenge to evidence of firearm discharge residue on the basis of likely cross-contamination from armed police.

R v Saffery
For first defendant accused of extensive internet trade in munitions, involving complex, technical explosives and firearms evidence. Tonnes of munitions amassed by 'militaria' dealer. Security Service link. Suspended sentence for s5 firearms and explosives.


R v W
Defendant accused of hacking Pippa Middleton's iCloud account, and offering stolen pictures of Kate Middleton for sale to the press in the name of the hacking collective the 'Dark Overlords'. Also accused of several international frauds. This case was reported in the UK (Daily Mail) and the US (Bank Info Security).

Mental health

R v M
Defendant accused of multi-kilo heroin importation found unfit to stand trial after contested hearing, then acquitted by a jury in the trial of issue.

R v A & Others
Defendant became unfit to plead on the eve of his multi-handed trial. The Court was persuaded neither to sever him nor to determine the issue of unfitness until half time, allowing for a submission of no case to be made. The submission succeeded and the defendant was acquitted.

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Financial Crime and Confiscation


Mark is an accomplished and highly regarded senior junior with a heavyweight criminal defence practice, specialising in serious and organised crime. He has a well-deserved reputation for the quality of his advocacy and his ability to win-over juries in the most difficult of cases.

Notable Cases

Terrorist Funding

R v O & Others
Defending in a case investigated by the Counter Terrorism Command Crime Disruption Unit, involving international fraud and money laundering.

R v A & Others
Defending the principal money launderer where funds were obtained through multiple 'vishing' frauds.

R v C
Defending money launderer in "Bank of Terror" case


R v G & Others
Leading junior defending a company director accused of conspiracy to cheat the Revenue in a £34m MTIC fraud, with almost £100m having been laundered through his company account. The client did not give evidence and was acquitted.

R v L & Others
Defending the director of a company said to have perpetrated a multi-million pound VAT and MTIC Fraud.

R v E & Others
Conspiracy to defraud. Eight-handed £80 million mortgage fraud. This case was covered by the BBC.

Financial Services

R (FCA) v Sappal & Others
Defending an allegation of insider trading. This case was reported by Reuters.

R v Sales
Boiler room fraud. An elaborate scheme, investors were persuaded to invest hundreds of thousands of pounds in a non-existent technology company.

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Professional Regulation


Having had a background in financial regulation, Mark is developing a Health and Safety and regulatory practice.

Notable Cases

Re Abu Mahfuz
Defence. Breach of FA Agents Regulations; authorised football agent accused of 'fronting.' FA Disciplinary Commission. This case was reported by Sky Sports.

R (HSE) v Brooks Crownhill Patternmakers
Defended a metal working company in a prosecution involving multiple cases of hand-arm vibration syndrome, and secured a small fine. More information can be found here.

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Notable Cases & News

All related news


After graduating Mark worked for a number of years at the then leading financial regulator the Securities and Investments Board. There, as well as being concerned with regulatory policy issues, he was asked to write speeches for senior staff which were delivered at conferences and events attended by leading City figures. This gave him the taste for advocacy and he came to the Bar. Since then he has been a tireless defender of people accused of serious crime.


  • UCL (Philosophy)
  • City University (Dip. Law)

Professional Membership

  • The Fraud Lawyers Association
  • Criminal Bar association


  • French

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