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Cooley (UK) LLP

Living Wage
Work 020 7583 4055
Fax 020 7785 9355

Mark Deem

Work +44 (0) 20 7583 4055
Cooley LLP

Work Department

Antitrust Litigation
Artificial Intelligence
Aviation - Manned & Unmanned
Commercial Litigation
Digital Media & Entertainment
International Commercial Arbitration
Internet & Social Media


Mark Deem is partner in Cooley's London office and a commercial litigator, with considerable experience of complex domestic and cross-border litigation, international arbitration and regulatory matters. He has conducted litigation in all commercial divisions of the English High Court, Court of Appeal, Supreme Court and Court of Justice of the EU; represented clients in international arbitration proceedings under the rules of the ICC, LCIA, RIDR and IFTA; and has a broad experience of mediation and other dispute resolution mechanisms.

He is a solicitor-advocate, with rights to appear in all courts in England and Wales and has considerable experience of managing clients' exposure to the risk and cost of commercial disputes, through the innovative use of ATE insurance, third party and other litigation-funding arrangements.

Mark focuses on technology, media and telecommunications (TMT) litigation, contentious privacy, data protection and cybersecurity issues and financial services disputes. He has particular experience in a variety of industry sectors, including aviation and aerospace, communications, digital, TMT and banking and finance.



Society for Computers & Law


College of Law, Guildford
LPC, 1998
Downing College, Cambridge
MA, 1997

London: Dispute resolution

Commercial litigation

Within: Commercial litigation

Cooley (UK) LLP's 'very approachable, timely team offers practical advice and costs are reasonable'. Its diverse practice covers asset recovery and claims arising from corruption, general commercial disputes, insolvency, insurance and investment treaty disputes as well as IP and life sciences litigation, product liability and technology disputes. Kevin Perry acted for Bambino Holdings in the defence of proceedings brought by US company, Bluewaters Communications Holdings, which relates to the sale of shares in Formula 1 racing in 2005. James Maton heads the firm's UK disputes practice; Laurence Harris is vice chair of the firm's global litigation department; and Mark Deem 'brings his considerable experience into play with quick and insightful analysis'. Product litigation lawyer Rod Freeman   joined from Hogan Lovells International LLP  and investment treaty special counsel Christophe Bondy was hired from Volterra Fietta.

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International arbitration

Within: International arbitration

Cooley (UK) LLP's 'lawyers stand out due to their¬†exceptional experience in the field of international investment law and their commitment to accomplish the best result for their clients'. The practice covers¬†international¬†commercial arbitration work, including¬†oil and gas exploration matters,¬†licensing rights in the Middle East, technology licensing rights, bio‚Äźsciences and product testing disputes, and international supply agreements. It also acts in¬†investment treaty arbitrations and¬†insurance and reinsurance-related¬†arbitrations.¬†James Maton¬†is London litigation head;¬†Mark Everiss¬†focuses on reinsurance litigation; and¬†Mark Deem¬†is 'a tough negotiator, but brings valuable commercial¬† perspective to the dispute resolution process at the right time'. Other key contacts are David Kendall,¬†Kevin Perry¬†¬†and James Crabtree.¬†Special counsels¬†Christophe Bondy, who¬†'has incredibly deep experience of investor-state arbitration', and¬†public international law specialist¬†Joshua Brien¬†joined from¬†Volterra Fietta¬†and The¬†Commonwealth Secretariat, respectively.

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London: Risk advisory

Data protection privacy and cybersecurity

Within: Data protection privacy and cybersecurity

The 'absolutely outstanding' privacy and data protection team at Cooley (UK) LLP acts for both large corporates and SMEs, and attracts praise for its 'great value for money'. It is instructed by several clients including software company Lumeon, TalentSky and US-based defence company Leidos on GDPR compliance programmes, which has included advising on matters of data processing, access and international data transfers. The group is  jointly led by Mark Deem and Ann Bevitt who focus on litigation and non-contentious compliance respectively. Former co-head Sarah Pearce left the team to join Paul Hastings LLP. Clients also include Lloyd's Market Association and the National Farmers Union Mutual Insurance Society.

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London: TMT (technology, media and telecoms)

IT and telecoms

Within: IT and telecoms

The 'responsive, highly skilled and knowledgeable' information technology team at Cooley (UK) LLP¬†is often instructed to advise emerging companies¬†in innovative technology matters, but also acts well-known brands on matters including procurement projects. The¬†'highly efficient' team is jointly led by commercial lawyer¬†Chris Coulter¬†(Sarah Pearce¬†having moved to Paul Hastings LLP), litigator Mark Deem¬†and¬†Ann Bevitt¬†(who specialises in data protection). Coulter has 'a¬†very strategic mind' and¬†is leading a team acting for Elliptic¬†Enterprises¬†‚ÄĒ a company offering cryptocurrency forensics and analysis to enforcement agencies and financial institutions¬†‚ÄĒ on matters concerning¬†data¬†acquisition, customer¬†engagement¬†and on new¬†business¬†ventures. In another work highlight the department is assisting Eve Sleep with commercial and strategic matters relating to online sales and advertising.

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Media and entertainment (including media finance)

Within: Media and entertainment (including media finance)

Cooley (UK) LLP’s expertise spans IP, copyright, trade marks, advertising, marketing, commercial, outsourcing, disputes, competition and corporate transactions; and has a growing its music and digital content practice. IP lawyer Nicholas Bolter  head of trade marks and acts for Twitter on its European trade mark work; and advises Netflix on its UK trade mark work. Becket McGrath handles EU and UK competition law and is instructed by BuzzFeed to represent it before the CMA on the authority’s phase 2 media public interest review of  21st Century Fox’s acquisition of Sky. The London team worked closely with the firm’s US office to advise Meredith Corporation on its $2.8bn agreement to acquire all outstanding shares of Time. Advising Union Square Ventures on SoundCloud's investment from The Raine Group and Temasek is another key highlight. IP and commercial lawyer Chris Coulter and Mark Deem  who specialises in TMT litigation, are also noted. Sarah Pearce has joined Paul Hastings LLP and Brian Chadwick has joined Fieldfisher.

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