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
Abstract digital art featuring colorful, horizontal streaks of light and geometric shapes in hues of blue, pink, and purple. The image creates a sense of speed and motion, with overlapping textures and a futuristic aesthetic.
Dispute Resolution
Insight

Using AI in civil fraud investigations

02.02.2026
In this article, Fiona Campbell and Alexandra Underwood examine the role of AI assistance in civil fraud investigations. When deployed within clear, auditable guardrails and under appropriate legal supervision, AI can materially reduce client cost exposure by accelerating large scale evidence review, identifying complex digital patterns and supporting urgent applications for protective court relief with greater speed and precision.
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Dispute Resolution
Insight

Law and AI: Shared terms, different meanings

29.01.2026
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Abstract digital art featuring a 3D mesh landscape with shades of purple, pink, and blue. The scene includes a network of connected points and lines, resembling a futuristic or sci-fi theme, against a black background with subtle, glowing elements and data-like patterns.
Dispute Resolution
Insight

What should AI literacy mean for UK lawyers?

14.01.2026
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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
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Insight

ILTA Generative AI Best Practice Guide (Outgoing Disclosure)

06.05.2025
Published by the International Legal Technology Association (ILTA), the Generative AI Best Practice Guide is a cross-firm collaboration between leading eDisclosure practitioners from UK-based commercial law firms. The Guide offers practical, defensible guidance on how legal teams can responsibly integrate Generative AI (GenAI) technologies into disclosure workflows, particularly under Practice Direction 57AD.
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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.