Fiona Campbell | Fieldfisher
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Professional background

Professional background

I initially qualified as a barrister in 2005. Having practiced commercial law at the Bar for three years, I moved to private practice and re-qualified as a solicitor (Ireland, 2009; UK, 2010). From 2011 until 2017, I spent time as in-house counsel in various multinational consultancies based in London, where I focused on combining law with technology to effectively manage high-profile disputes and investigations. I returned to private practice in 2017.

The cases I work on often involve multiple jurisdictions and complex issues. 
 
My key cases have included:

  • Acting for a construction company in a £100m claim regarding alleged defective infill;
  • Acting for a number of litigants in a negligence and breach of contract claim regarding a financial organisation's role as a custodian of funds, which were lost as a result of fraud;
  • Acting for global financial organisations in LIBOR, HIBOR, SIBOR, FINMA and FX investigations;
  • Cross-border litigation of a global technology organisation in FCPA and Bribery Act investigations;
  • Acting in one of The Lawyer’s ‘Top 20 Cases of 2022’ in respect of a US$2 billion fraud claim brought by a state-owned bank;
  • Acting in a probate and rightful ownership claim in respect of an estate worth in excess of £100m;
  • Acting in a high-profile public inquiry examining systemic failures, strategising and advising on acceptable AI-usage and legal technology application to the management of over 100 million documents.

I am widely recognised as a leading authority on AI and legal technology in the UK, with deep expertise in eDisclosure and best practice procedures under the rules of the courts of England and Wales, as well as international arbitral institutions. I sit on the Law Society's AI Task Force, the board of the International Legal Technology Association (ILTA), the ACEDS Women in AI Board, and several other advisory panels focused on legal innovation, ethics and responsible AI deployment. I have played a key role in drafting a number of foundational protocols in this space, including the court-endorsed ILTA AI Exchange Protocol, the ILTA Active Learning Best Practice Protocol, and its recent GenAI Addendum.

I am a frequent speaker at legal technology and AI conferences, and regularly deliver training and seminars on the intersection of AI, disclosure obligations, and defensible legal workflows. In 2025, I received the AI Visionary Award for contributions to responsible AI in legal practice. In 2022 and 2023, I was listed as a Thomson Reuters Stand-Out Lawyer.

I hold a Bachelor of Civil Law (University of Galway, 2003), a Master’s in International Law (Trinity College Dublin), and a Barrister-at-Law degree (King’s Inns, 2005). I am also an accredited mediator, a member of the Oil and Gas Arbitration Club, and hold various specialist accreditations in eDisclosure, AI and privacy (including CIPP/E).

Awards & recognition

Awards & recognition

Thomson Reuters Stand-out Lawyers - independently rated lawyers
Fiona is extremely knowledgeable and thorough. She is someone that will get the job done right and on time, she is a good leader, takes charges and coordinates with outside consultants, and is someone that will run with it, unlike others that you would have to nudge along or babysit.
Thomson Reuters Stand-out Lawyers - independently rated lawyers
She is very responsive with communications. She's someone you can count on with a serious matter that you're dealing with, and I think she's also just a nice pleasant person to work with.

Authored pieces

All Resources
A digital world map is depicted with glowing blue dots representing continents on a dark background. Bright, multicolored bokeh lights are scattered across the image, adding a dynamic and futuristic feel.
Dispute Resolution
Insight

Generative AI and Legal Practice: A Warning from the High Court

14.07.2025
The recent High Court Divisional Court decision in Ayinde v London Borough of Haringey [2025] EWHC 1383 (Admin) and Hamad Al-Haroun v Qatar National Bank QPSC and QNB Capital LLC (heard together) issues an unambiguous warning to the legal profession: Generative AI (GenAI) cannot be relied upon without proper verification and the full weight of professional regulation applies to any material a lawyer endorses, regardless of whether it was drafted by a person or a machine.
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A digital illustration of a globe with neon blue lines and rings, overlaying a dark background with financial graphs and data. The image evokes a sense of global connectivity and financial markets.
Insight

ILTA Generative AI Best Practice Guide (Outgoing Disclosure)

06.05.2025
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Dispute Resolution
Insight

A future of responsible AI deployment in the UK

12.03.2025
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Two people are walking on a wet street at night, illuminated by streetlights. They are approaching a large painted Y-shaped arrow on the ground, which splits into two directions. The scene has a moody, reflective atmosphere.
Dispute Resolution
Insight

Obtaining US-based evidence using US Federal Statute 1782

16.12.2024
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Dispute Resolution
Insight

Ex-Jurisdictional Disclosure

05.08.2024
Fieldfisher's Head of Electronic Disclosure, Fiona Campbell has drafted a guide that considers the mechanisms available under UK law for obtaining documents located outside the country's jurisdiction. The guidance explores letters of request, Norwich Pharmacal Orders, and international treaties, detailing how these legal tools can be utilised to secure evidence crucial for civil proceedings in the UK courts. The guidance can be downloaded by clicking the link below.
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What others say…

Thomson Reuters Stand-out Lawyers - independently rated lawyers
Fiona is extremely knowledgeable and thorough. She is someone that will get the job done right and on time, she is a good leader, takes charges and coordinates with outside consultants, and is someone that will run with it, unlike others that you would have to nudge along or babysit.
Thomson Reuters Stand-out Lawyers - independently rated lawyers
She is very responsive with communications. She's someone you can count on with a serious matter that you're dealing with, and I think she's also just a nice pleasant person to work with.