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David Zeffman

David Zeffman

Head of Gambling and Sport

CMS Cameron McKenna Nabarro Olswang LLP
Cannon Place
78 Cannon Street
United Kingdom
Languages English

David has been one of the leading lawyers in the UK media sector for over 25 years and has extensive experience providing strategic, commercial and regulatory advice to clients in the gambling, sport and television sectors. He has been involved in many of the major transactions that have taken place in these sectors, including the launch of several television channels and the sale of media rights to some of the world's biggest sporting competitions.

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David Zeffman of CMS advises major clients in cricket and football in relation to global media rights, as well as sponsorship arrangements. Clients describe him as "brilliant, bright, commercial and well connected."

Chambers 2019

London-based David Zeffman of CMS is head of the firm's gaming and sport practice and possesses a wealth of experience acting for prominent gaming operators on regulatory, corporate and commercial matters. Sources describe him as "a very substantive, strong person in gaming," with one interviewee professing: "I regard him as a guru in the area, I rate him very highly."

Chambers 2019

David Zeffman advises some of the most well-known online gaming operators in the sector on transactions, regulatory issues and contentious cases. Clients value him for his "experienced guidance and great commercial judgement."

Chambers 2019

London-based David Zeffman of CMS is head of the firm's gambling and sport department. Sources praise him as "well connected and he knows the industry very well." Interviewees appreciate that "he has brought attention to the UK gaming market." He regularly provides strategic, regulatory and commercial advice to clients within the industry, with a particular focus on the horse-racing sector.

Chambers 2019

Relevant experience


  • Gamesys on a range of commercial, regulatory and corporate matters including: the sale of its JackpotJoy and other brands to Intertain for an initial payment of GBP 425.8m; advising on its online gaming partnership with the New Jersey casino Tropicana; the acquisition of Virgin Games; and Gamesys’ partnership with Metric Gaming to launch its sportsbook offering.
  • The Gibraltar Betting and Gaming Association on its legal challenges to the UK Government’s reform of the taxation of remote gambling services and to the introduction of place of consumption licensing and regulation in Britain.
  • GVC with regulatory advice in the context of its bid for bwin.party Digital Entertainment Plc, as well as providing support during the due diligence process running-up to the successful bid made by GVC for bwin.party.
  • Tote Media Limited, (established by Betfred owner and chairman, Fred Done) on its deal that enabled the Great Leighs racecourse to reopen.


  • The ECB on its GBP 1.1bn sale of the UK media rights to English cricket from 2020-2025.
  • ICC on its global media rights tender, bidding and evaluation process for 18 tournaments between 2015 and 2023.
  • The Government on the future funding of British horseracing following the decision of the European Court of Justice in the William Hill v BHB database rights case.
  • FIFA on the worldwide sale of media rights to the 2010 and 2014 World Cups.
  • Setanta Sports, SingTel, Sky Italia, Dentsu and many others on their acquisition of rights to broadcast Premier League football.


  • The launch and/or subsequent operations of many television channels since the launch of satellite television in the 1980s including MTV Europe, VH1, FilmFour, E4, AtTheRaces, Bloomberg and Eurosport.
  • The set up, funding, launch and all activities of the DTT pay television platform Top Up TV.
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  • 1980 - MA Jurisprudence,  Brasenose College, Oxford
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  • Member - The Editorial Board of World Online Gambling Law Report and World Sports Law Report.
  • Member - International Masters of Gaming Law.
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Show only
October 2019
Your win­ning team
27 Jan 20
Gambling Com­mis­sion an­nounce the form­a­tion of gambling in­dustry work­ing...
As part of its ef­forts to make gambling safer, the Gambling Com­mis­sion has an­nounced the form­a­tion of three in­dustry work­ing groups. Each group will fo­cus on a dif­fer­ent as­pect of the in­dustry that has...
CMS Ex­pert Guide to On­line Gambling Reg­u­la­tion in Europe
14 Jan 20
ASA rules that Bet­way You­Tube video breached the CAP Code
On 8 Janu­ary 2020, the Ad­vert­ising Stand­ards Au­thor­ity (“ASA”) pub­lished their rul­ing in re­la­tion to a video pub­lished on You­Tube by Bet­way Ltd ("Bet­way"). Con­trary to Bet­way's view that the video...
12 January 2018
CMS Sport
your win­ning team
22 Nov 19
ASA rules that Merkur Cashino pro­mo­tion was not aimed at chil­dren
On 20 Novem­ber 2019, the Ad­vert­ising Stand­ards Au­thor­ity (“ASA”) con­cluded that a pro­mo­tion on the back of a child's bus tick­et for Cashino Gam­ing Ltd t/a Merkur Cashino (“Merkur Cashino”) of­fer­ing...
22 Jan 20
CMS Gambling Con­fer­ence 2020
19 Nov 19
UK-based gambling firms to ex­pect ser­i­ous com­plic­a­tions when re­ceiv­ing...
Gov­ern­ment rep­res­ent­at­ives have warned com­pan­ies op­er­at­ing in the gambling sec­tor that in­ter­na­tion­al trans­fers of per­son­al data will be­come sig­ni­fic­antly more com­plex fol­low­ing the UK’s exit from the...
15 Oct 19
ASA rules Casumo ad was tar­geted ir­re­spons­ibly
On 9 Oc­to­ber 2019, the Ad­vert­ising Stand­ards Au­thor­ity (“ASA”) con­cluded that a sponsored Google search res­ult for Casumo Ser­vices Lim­ited (“Casumo”) of­fer­ing free spins had been ir­re­spons­ibly...