Sarah Ellson | Fieldfisher
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Professional background

Professional background

I advise businesses in highly regulated sectors and have a particular interest in health and life sciences but also in education, sport, legal, surveying, policing, social care and finance.  I have also acted for regulatory bodies for over 20 years and have earned a name as a leading individual in the field of healthcare regulation and professional discipline.
 
Drawing on my public and administrative law experience I provide independent audit, investigation and review services to Boards and Senior Executive Teams in relation to complaints handling, disciplinary processes and governance.  I will often work with them to manage their ongoing regulatory relationships.
 
I provide strategic advice in relation to regulation and compliance in the UK and overseas.  I have helped develop new regulatory frameworks for professions and sectors and I have supported innovative businesses as they navigate the regulatory landscape, for example in online health and pharmacy services and CBD. I train and support staff and decision makers at public bodies and act for clients bringing and defending judicial review cases.
 
I regularly speak at national and international regulatory conferences and have published numerous articles on fitness to practice issues.

Awards & recognition

Awards & recognition

Legal 500
Sarah Ellson is exceptional. Helpful and speedy answers that are decoded for the lay person. Sarah has spent the time getting to know us, and she is easy to access, communicative and pragmatic. Clear sighted and well-expressed advice.
Chambers 2023
She is an excellent litigator with a good eye for broader strategic issues.
Legal 500
Sarah Ellson is a standout partner with a wealth of experience, calm judgement and a clarity of thought and analysis that is just fantastic.

Authored pieces

All Resources
An offshore oil rig is silhouetted against a colorful sunset sky. Bright flames are seen burning from a flare stack on the left side, and various equipment and lights illuminate the platform, which is surrounded by calm ocean waters.
Public and Regulatory
Insight

North Sea drilling: opportunities and legal risks

31.07.2026
Political signals may point towards renewed opportunities for North Sea oil and gas projects, but recent litigation demonstrates that developers should continue to expect rigorous environmental scrutiny and legal challenge.
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Close-up of a laboratory setting featuring a plastic test tube rack and graduated pipettes submerged in water with bubbles surrounding them. The background transitions from pink to blue tones, creating a visually appealing scientific scene.
Life Sciences
Insight

The European Court of Justice opens the way for chemically synthesised generics of reference biological medicinal products

29.04.2026
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Public and Regulatory
Insight

CMA’s final report on vet services: what businesses need to know

30.03.2026
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Close-up of several blister packs filled with blue and white capsules. The capsules are arranged in a grid-like pattern, and the lighting highlights some of the rows, giving a metallic sheen to the packaging.
Life Sciences
Insight

The European Court of Justice issues a landmark decision concerning defective medicines, facilitating patient indemnification

27.03.2026
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Technology
Insight

UK Government calls on regulators to set out plans for enabling safe AI innovation

09.03.2026
A big topic of conversation with our regulator clients in recent months has been how to use AI in regulatory decision-making and how to guide the organisations that they regulate on the appropriate use of AI. Our recent article  explored this in detail.
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What others say…

Legal 500
Sarah Ellson is exceptional. Helpful and speedy answers that are decoded for the lay person. Sarah has spent the time getting to know us, and she is easy to access, communicative and pragmatic. Clear sighted and well-expressed advice.
Chambers 2023
She is an excellent litigator with a good eye for broader strategic issues.
Legal 500
Sarah Ellson is a standout partner with a wealth of experience, calm judgement and a clarity of thought and analysis that is just fantastic.