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
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
In a landmark decision issued last Thursday, the Court of Justice of the European Union ruled that a medicines agency may grant a marketing authorisation for a chemically synthesised product as a generic of a reference biological medicinal product. This decision applies across all EU Member States and is expected to have significant implications for the pharmaceutical sector.
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Public & Regulatory
Insight

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

30.03.2026
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Close-up image of an abstract 3D circuit board with glowing blue and purple lines and blocks. The intricate pattern creates a futuristic, high-tech appearance, suggesting themes related to technology and digital connectivity.
Technology
Insight

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

09.03.2026
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A lively concert scene where several attendees are holding up their smartphones to capture photos and videos. The stage is bathed in colorful lights, creating a vibrant atmosphere. The background is slightly blurred, with the focus on the raised phones.
Public & Regulatory
Insight

Martyn’s Law: 10 myths about the Terrorism (Protection of Premises) Act 2025

11.12.2025
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Public & Regulatory
Press Release

Fieldfisher acts for Trade Remedies Authority in landmark Judicial Review victory

20.05.2025
Fieldfisher is pleased to have acted for the UK Trade Remedies Authority (TRA) in a significant judicial review case that reaffirms the TRA’s investigative approach and clarifies the scope of its legal obligations.
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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.