Jonathan Peters | Fieldfisher
Skip to main content
Professional background

Professional background

I provide strategic advice on all aspects of regulatory decision-making. I have acted on high profile litigation in the High Court, Court of Appeal and Supreme Court. I have also advised on investigations, inquiries and non-contentious matters across a broad range of sectors including financial services, technology, media and construction.
 
I have a particular interest in the regulation of technology, and have spoken at conferences and written for legal publications on the topic of digital competition law.

 

I am recognised as a 'key lawyer' in 'EU and Competition Law' in the 2026 edition of Legal 500 and have been described by clients as having 'faultless drafting' and 'always on top of the detail'.
 
My recent experience includes: 

 

  • Acting for a non-departmental public body on challenges to its £200m annual levy;
  • Advising a core participant to the Grenfell Tower Inquiry;
  • Assisting an industry regulator with its first ever statutory investigation, looking into unlawful business practices;
  • Advising a financial regulator on its engagement with and response to an independent investigation;
  • Advising on a £170m High Court claim for breaches of competition law;
  • Advising clients on competition and consumer law investigations by the Competition and Markets Authority.

Authored pieces

All Resources
A close-up of a digital fingerprint illustration with vibrant colors. The fingerprint has intricate, curved lines and is depicted in shades of blue and purple, with a glowing effect against a dark background. The image represents biometric security technology.
Technology and Data
Insight

Tech Regulation Newsletter – January 2026

28.01.2026
Our first edition of the year covers the trends to look out for in 2026 in digital regulation across the EU and UK. Regulators' crosshairs – and much political debate – has focused on AI, online safety and large digital platforms. At the same time, measures such as the UK Data (Use and Access) Act, and EU Digital Omnibus Package, aim to streamline and consolidate the complex patchwork of digital regulation that has emerged in recent years.
Learn more
A digital representation of Earth adorned with a network of glowing interconnected nodes and lines, set against a dark background. Vibrant blue and purple lights and dots create an abstract, futuristic look with bright light emanating from the top of the globe.
Public & Regulatory
Insight

First SMS designations issued under the new Digital Markets Regime: Breaking down the CMA's assessment

04.11.2025
Learn more
Close-up of a computer mouse on a dark mouse pad, illuminated by a purple and blue light. The background is slightly blurred but features a clutter of wires and computer components, with various LEDs and screens creating a moody, tech-centric atmosphere.
Public & Regulatory
Insight

Challenging Ofcom Decisions under the Online Safety Act

11.08.2025
Learn more
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.
Technology and Data
Insight

Tech Regulation Newsletter – June 2025

02.06.2025
Learn more
Technology and Data
Insight

Tech Regulation Newsletter – Q1 2025

30.01.2025
Our first edition of 2025 sets out the key EU / UK regulatory developments in digital platforms, online safety, cyber, AI and data. A large amount of long-planned regulation came into force in December and January, including the UK's new digital markets regime, EU Cyber Resilience Act and DORA. Check below whether your business is in scope, and if and when further steps may be required to comply.
Learn more