Jonathan Barker is described by the leading legal directories as “impeccable in court”, a “really excellent jury advocate” and as someone who can “always be trusted to provide a first-rate service for clients and solicitors”. He is ranked in both Chambers and Partners and the Legal 500 for his expertise in Crime; and by the Legal 500 for Business and Regulatory Crime (including Health and Safety). Jonathan’s reputation as an advocate and lawyer has resulted in him being shortlisted for the award of ‘Crime and Extradition Junior of the year” by the Legal 500 Bar Awards 2024.
There are three core areas to Jonathan’s practice:
Jonathan is ‘in demand’ from both leading defence solicitors and prosecution agencies. Instructing solicitors praise his commitment and unwavering determination to providing outstanding legal representation. Jonathan’s cases are often paper heavy and the result of significant investigations. He is said to have a “technical mind” which “allows him to assimilate complex information quickly”. Jonathan can provide advice at all stages of proceedings including pre-charge advice.
Jonathan read law at University College London and is a Queen Mother Scholar of the Middle Temple. He is a pupil supervisor and advocacy trainer for the Midland Circuit. He is an Independent Safeguarding Panel Member for British Athletics. He is on the CPS Advocate Panel for General Crime, Serious Organised Crime and Fraud all at Level 4 (the highest level) and on the Rape and Serious Sexual Offences (RASSO) Panel.
Jonathan is regularly instructed in cases involving allegations of murder, manslaughter, attempted murder and conspiracy to murder.
Examples include:
Jonathan is instructed in the following type of cases:
Jonathan is instructed in the following type of cases:
He has received comprehensive training in cross-examining young and vulnerable witnesses. In one case, involving an allegation of rape, the trial judge described Jonathan’s cross-examination of a young complainant as a “model example”. Jonathan’s client was ultimately acquitted of rape and associated offences. Jonathan has experience in the victim’s right to review scheme and was instructed to judicially review a CPS decision to prosecute an individual for rape. He regularly defends professionals accused of sexual offences.
Jonathan has considerable experience in cases involving serious organised crime. He is on the CPS panel at level 4, the highest level. Jonathan is instructed in the following type of cases involving allegations of organised crime:
Jonathan has been involved in many cases involving the application the Proceeds of Crime Act 2002. He has particular experience in confiscation, asset restraint and cash forfeiture and has lectured on these subjects.
Jonathan is available to receive instructions in road traffic cases in the Magistrates Court on a private basis, including instruction on a Direct Access basis. He has experience in representing individuals facing allegations of:
Jonathan also has experience in successfully arguing ‘Exceptional hardship’ and ‘Special reasons’.
In the Crown Court, Jonathan has experience in representing those accused of serious driving related offences where death or serious injury has been caused.. He is prepared to take on such cases on both a legal aid and private basis.
Jonathan’s experience includes successfully representing a high school teacher before his professional body, and successfully representing a nurse in relation to the death of a patient. He has amassed significant experience in representing teachers, prison officers, carers and police staff.
Jonathan prosecutes and defends cases brought by the Environment Agency and local authorities.
Jonathan’s recent experience includes defending a nurse in a very high-profile multi-defendant prosecution relating to the death of a patient outside a West Midlands Hospital. The defendant was indicted with an offence contrary to s 33(1)(a) of the Health and Safety Work Act 1974; representing a Scaffolder for one offence contrary to section 8(b) of the Work and Height Regulations 2005 and section 33(1)(c) of the Health and Safety at Work Act 1974; representing the Leicester, Leicestershire and Rutland Combined Fire Authority in respect of offences contrary to Article 32 of the Regulatory Reform (Fire Safety Act) Order 2005. His acts for and against cases brought by the HSE and local authorities.
Jonathan has significant experience in these areas having prosecuted and defended in many cases brought by local councils, including Birmingham City Council, both before the Magistrates and Crown Court. His is also fully acquainted with the Proceeds of Crime Act 2002, which typically operates in such cases and can be of significant concern to defendants.
“Jonathan is a gifted advocate and extremely approachable in all aspects of the case.” Chambers & Partners 2025
“He is a reliable and extremely capable counsel.” Chambers & Partners 2025
“Jonathan has a technical mind which allows him to assimilate material very quickly. He focuses on the issues and the intricacies of each case in order to represent his clients to the very best of his ability, which is indeed outstanding. He is extremely good with lay clients and their families and in legal arguments he can think on his feet and address all issues eloquently and with meaning.” Legal 500 2025
“Jonathan is meticulous in his preparation, and a fantastic strategical and tactical thinker.” Legal 500 2025
“Jonathan can always be trusted to provide a first-rate service for clients and solicitors.” Chambers and Partners 2024
“Jonathan is a really excellent jury advocate. He is also very engaging with lay clients.” Chambers and Partners 2024
“Jonathan is a very hard-working and capable advocate. He obtains the trust of the lay client immediately through his thorough preparation and gentle manner. He is impeccable in court. He is genuinely respected by all at the bar and judiciary. His closing speeches are engaging and persuasive to a jury, and his cross-examination is on point.” Legal 500 2024
“Jonathan has a very technical mind and is able to assimilate in-depth evidence very quickly. He has a good presence in front of a jury and commands the attention of the court room. He has good relationships with other members of the Bar and respect for the judiciary.” Legal 500 2023
“Jonathan is extremely approachable and helpful.” Legal 500 2023
“A confident, thoughtful, hard-working advocate with a great manner in court. He is excellent.” Chambers UK 2022
“I have come to admire Jonathan’s work ethic, enthusiasm and determination to provide the absolute best representation for his clients. Jonathan works tirelessly on behalf of his clients and unsurprisingly has achieved excellent outcomes for them over the years.” Legal 500 2022
“A straight talking down to earth jury advocate who has a fantastic ability to cut through complex subject matter and present it to a jury in a clear, concise and engaging manner.” Legal 500 2021
“Prepares cases well and does not miss anything.” Legal 500 2020
“His technical mind allows him to assimilate complex information quickly.” Legal 500 2019
Christopher Millington KC and Jonathan Barker represent mahek bukhari in tiktok murder trial
Christopher Millington KC and Jonathan Barker defend in the “A46 double murder” trial
Jonathan Barker Prosecutes Pharmacists for illegal Supply of Prescription Medicines
LLB Law – University College London
English