James has a strong personal injury practice, with experience handling cases in the High Court and Court of Appeal. ‘He’s technically excellent and a gifted advocate.’ James handles the client really well and is reassuring and pragmatic.’ He is forensically detailed in his approach.’”

Chambers UK 2024, Personal Injury

James is an experienced personal injury and clinical negligence barrister with sub-specialisms in costs and professional negligence.  He is ranked in The Legal 500 in costs (Tier 1), clinical negligence and personal injury.

He acts for both claimants and defendants in all aspects of personal injury and clinical negligence work but is well known for acting in cases where dishonesty is alleged or where there are complex liability or quantum issues.  His present workload includes a large number of cases for both claimants and Insurers/Trusts worth in excess of £1million where he acts as sole junior often in cases against silks.   He is often instructed in industrial disease and construction cases, and present instructions include a large number of pain cases.

James has an extensive related practice acting in all professional negligence, insurance and costs related matters where he is regularly instructed to act in contribution and property damage cases.  He brings an expertise in procedural matters to all work he undertakes and is well regarded as a trial advocate.

Directory Quotes

James does not back away from a difficult or challenging case. He is robust yet able to change his style in cross examination, depending on the individual in front of him, and his advocacy is second to none. He has an excellent way with clients to make them feel at ease.”

Legal 500 2023, Personal Injury

James is extremely engaging, commercial and pragmatic. He has an amazing ability to identify the heart of the issues, and deliver advice which truly understands the client’s prospective. He is also extremely responsive.”

Legal 500 2022, Personal Injury

James is incredibly clear and quietly fierce.”


James provides reliable and clear advice, which takes into consideration the client’s needs. He has an eye for detail often overlooked by other members of the bar. What may seem innocuous to others can be crucial to a case and he has the knack of applying perfect weight to the issues which allows him to rescue even the most dire cases.”

legal 500 2021, COSTS

James is an excellent advocate. He is analytical, pays great attention to detail and provides stellar advice. He is ultra client focused.”

Legal 500 2021, Personal Injury

Focused and unflappable, offering high quality advocacy and pragmatic advice.”

Legal 500 2021, Clinical Negligence

Seminars & Events

  • Professional memberships:

    • LLB (Hons) Durham & BVC Nottingham
  • James Marwick is regulated by the Bar Standards Board (BSB) and holds a current practising certificate. If you are not satisfied with the service provided, please read here.