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Public Law, Procurement and Regulatory

Faced with increasingly complex and frequently changing regulatory and legal frameworks, businesses turn to CMS to bring unparalleled experience in public law, regulatory and procurement challenges to achieve their strategic objectives.

CMS has supported businesses in more reported public law disputes over the last three years than any other UK law firm. Across the board, we have unique depth of experience in our key sector areas and further afield. 

Whether considering a challenge to a regulator’s decision, pushing-back on a U-turn in approach, contesting regulatory enforcement action, challenging a procurement process, or disputing the jurisdiction of the regulator, we see public law and regulatory engagements as multi-faceted, often incorporating commercial, political and media engagement, requiring a holistic approach. 

As the complex ramifications of the new legal order in the UK following Brexit continue to unfold, we work with businesses to creatively marry our legal and practical expertise with their core commercial objectives. 

We principally act for businesses against regulators, public bodies and on both sides of procurement challenges protecting their commercial interests. We do also act for public authorities and our experience of advising on both sides enables us to give real insight into the opposing party’s approach.

Our disputes team works hand-in-hand with specialists in other areas across the firm, including our market leading energy and climate change and public procurement teams. This is why businesses turn to us to achieve results in bet-the-business challenges.

Our experience includes advising:

  • AEG Presents Limited in a procurement claim and parallel judicial review claim brought by its global rival, Live Nation (Music) UK Ltd, against the Secretary of State for Digital, Culture, Media and Sport and The Royal Parks relating to the tender process for the 2020-2025 contract for British Summer Time Hyde Park music festival.
  • CityFibre in its judicial review claim against the Advertising Standards Authority (“ASA”) with strategic importance to full-fibre roll-out in the UK, with wider 5G infrastructure implications.
  • A number of businesses at various stages of ongoing CMA consumer investigations - both at investigation and enforcement stage (including by way of claims filed against the CMA and defending enforcement action brought by the CMA in the High Court).
  • A fortune 500 global power company, in a high profile dispute with the Utilities Regulator in relation to the closure of units. CMS successfully resolved the dispute without having to commence formal proceedings.
  • An online secondary ticketing operator in respect of a range of regulatory issues, including in relation to its continuing engagement with the CMA following the agreement of an Enforcement Order.
  • Several gambling operators in relation to enforcement investigations and licence reviews by the Gambling Commission.  
Awards & Recognitions
01
  • Quote
    "They're the law firm I like working with most; I've never had anything but excellent service from them."
    Chambers, 2021
  • Quote
    "A team that draws effectively on its scale, in terms of resources and experience."
    Legal 500, 2021
  • Quote
    "A modern, user-friendly, extremely knowledgeable and able practice with particularly impressive aptitude for seamless cross-departmental working in demanding public law cases involving a cross-over with different areas of law."
    Legal 500, 2021

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29 Jul 2025 2 min read

Transition then transformation: AI in construction disputes

07 Jul 2025 2 min read

How are construction-sector disputes changing?

17 May 2024 2 min read

Protection from protests

23 Nov 2022 1 min read

Events

  • United Kingdom
    20 Apr 2026

    Skills for Future Facing Teams: The Emotionally Intelligent Leader

  • United Kingdom
    21 Apr 2026

    On the Pulse webinar series 2026 - Spring/Summer

  • United Kingdom
    21 Apr 2026

    Future of Renewables Spring Seminars

  • United Kingdom
    22 Apr 2026

    Sustainable Buildings: Taking the Temperature in 2026

  • United Kingdom
    23 Apr 2026

    ESG: Breaking Down the Buzzword

  • United Kingdom
    28 Apr 2026

    Strategic expansion to India: A new chapter for UK higher education

  • United Kingdom
    28 Apr 2026

    IP Insights webinar series 2026

  • United Kingdom
    29 Apr 2026

    CMS Update Morning: Media, Sports and Entertainment

  • United Kingdom
    02 May 2026

    CMS at INTA 2026

  • United Kingdom
    05 May 2026

    Joint seminar with CMS and Tannenbaum Helpern - A global perspective on securing, maintaining, and enforcing...

  • United Kingdom
    05 May 2026

    Cross-Border Financial Services 2026 webinar series

  • United Kingdom
    07 May 2026

    A new era? The Employment Rights Act 2025 and AI in employment disputes

  • United Kingdom
    11 May 2026

    Skills for Future Facing Teams: The Adaptable Leader in Conflict

  • United Kingdom
    13 May 2026

    2026 ITechLaw World Technology Law Conference in Chicago

  • United Kingdom
    20 May 2026

    A new era? The Employment Rights Act 2025 and AI in employment disputes

Local market knowledge. Global outlook

We provide future-facing legal advice to help your organisation thrive. Combining local market knowledge and a global perspective, and with lawyers in locations worldwide, your organisation benefits from the expertise it needs, even across borders.

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