Department profile
CMS

Gaming

UK Guide 2026 : UK-wide

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CMS

Rankings

About

Provided by CMS

Please visit the CMS website for more details about the practice and our work:

Law firm specialised in Gambling - CMS in the UK

Chambers Review

Provided by Chambers

Gaming - UK-wide

Band 2

What the Team is Known For
CMS offers a full range of assistance to leading names in the gambling industry. The firm regularly counsels on high-value transactions, regulatory investigations and commercial agreements. CMS is also well placed to advise on contentious matters as well as data protection issues. The firm is frequently active on cross-border work.
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Work Highlights

Provided by Chambers

  • CMS advised OpenBet on a £50 million investment in Strive Gaming and provided training to the client's personal management licence holders.

Strengths

Provided by Chambers

  • CMS are very responsive and well organised. They understand clients' expectations and get things done really effectively, always letting you know the timeline it takes for the work product.

    Gaming respondentUK

  • CMS's insights and expertise ensure it provides practical advice that my company can act on meaningfully. The team is extremely responsive and always available to discuss any concerns or issues.

    Gaming respondentUK

  • CMS offers in-depth knowledge of the operational realities of the agreements and identification of what is crucial and what is superfluous.

    Gaming respondentUK

  • CMS is extremely knowledgeable and very timely with responses.

    Gaming respondentUK

  • CMS offers excellent all-round and in-depth knowledge of all matters related to sports, gambling and competition law.

    Gaming respondentUK

Notable Practitioners

Provided by Chambers

  • David Zeffman
    David Zeffman

    David Zeffman

    Head of the gambling and sports team at CMS, David Zeffman provides expert regulatory advice and corporate transactional support. He acts for online and land-based operators, as well as for financial institutions.

    • He is very knowledgeable and effectively manages a team of associates and fellow partners to get results quickly. A thoroughly knowledgeable individual who understands this space well.

      Gaming respondentUK

    • David and his team contribute so much to our business and expansion.

      Gaming respondentUK

    • What truly sets him apart is his expertise in the overall gaming industry. His experience working with many segments of this industry gives him unparalleled insight into business and legal needs.

      Gaming respondentUK

    • David is a leader in his field in sports, gambling and related competition law. He consistently demonstrates a challenging but constructive approach which achieves results

      Gaming respondentUK

    • David has seen it all.

      Gaming respondentUK
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  • Anna Soilleux-Mills
    Anna Soilleux-Mills

    Anna Soilleux-Mills

    Anna Soilleux-Mills is noted for her expertise in advising major clients in the gaming sector. She advises on commercial, compliance and regulatory matters.

    • Anna Soilleux-Mills is very personable, quick and responsive to queries, with good attention and an eye for detail as well, which is very important for us.

      Gaming respondentUK
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  • Tamsin Blow
    Tamsin Blow

    Tamsin Blow

    Tamsin Blow is particularly active for online gambling operators, advising on contentious matters such as investigations and enforcement actions. She is also noted for her assistance with regulatory and licensing mandates.

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Ranked Individuals at CMS (3)

UK-wide

Members

Provided by CMS

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