Jonathan Clark > Slaughter and May > London, England > Lawyer Profile

Slaughter and May

Living Wage

Work Department

Dispute resolution.


Jonathan is a Partner in our Dispute Resolution group and also a member of our Global Investigations Group. His practice spans a broad range of commercial litigation, investigations and contentious regulatory matters.  Jonathan also has a strong contentious insolvency and competition litigation practice.


Trained Bell Gully; qualified 2004 (New Zealand), 2008 (England and Wales); joined Slaughter and May 2007; partner 2014.

Lawyer Rankings

London > Dispute resolution > Banking litigation: investment and retail

Within: Leading individuals -

Jonathan Clark

Slaughter and May

Slaughter and May‘s ‘excellent all-rounders‘ act for a broad spectrum of clients in the financial sector, including investment banks, major building societies, accountants, hedge funds, actuaries and private equity firms, and the practice stands out for  high-value, technically-demanding, multi-jurisdictional disputes. In one of the largest and most significant global investigations undertaken by regulators since the financial crisis, the team acted for JPMorgan Chase & Co in regulatory and governmental investigations (and related civil claims) into foreign exchange trading at a number of banks. Sarah Lee is dispute resolution group head, Deborah Finkler has led on many of the firm’s investigative and enforcement actions, and Jonathan Clark‘s practice includes advising on litigation involving complex derivatives transactions, benchmark manipulation and regulatory investigations. Also highly regarded are Richard Jeens, Ewan Brown and recently promoted partner Camilla Sanger. At associate level, Peter Wickham is also noted.

London > Dispute resolution > Commercial litigation

Slaughter and May is ‘a class act – the Rolls-Royce service for commercial litigation‘. Acting for FTSE 100 clients across all industry sectors, the practice attracts some of the most significant, complex and high-value cases in the market. Demonstrating the strength of the firm’s practice, in what is reportedly one of the largest lawsuits in English legal history,  Richard Swallow and Efstathios Michael acted for BHP Group (BHP), an Anglo-Australian multinational mining, metals and petroleum company, and four non-UK-domiciled BHP entities, all of whom are defendants to claims that arose out of the collapse of the Fundão dam in Brazil. Sarah Lee heads the firm’s dispute resolution group while former practice head Deborah Finkler  has a broad practice but is particularly experienced in banking litigation and regulatory investigations as well as complex recovery and insolvency work.  Other highly regarded advisers in the team include Damian Taylor, Jonathan Clark, Richard Jeens and James Stacey, while Megan Sandler and Kimia Shedy are the senior associates to note. Camilla Sanger and Holly Ware were made partners in 2018.

London > Dispute resolution > Competition litigation

Slaughter and May’s cross-practice competition litigation group draws upon the expertise of the firm’s dispute resolution and competition departments. Work spans the full range of litigation and includes damages actions at all levels of the UK judicial system, cross-border contentious work coming in through the group’s ‘best friends’ network, regulatory appeals and judicial review proceedings. In the follow-on damages space, the team advises clients on actions arising as a result of a number of high-profile cartel investigations by authorities in the trucks, air cargo, smartcards, glass manufacturing, and other industries. Prominent in this respect is the team’s assistance to defendant British Airways during the air cargo multi-party litigation before the English, Dutch and German courts. Another notable highlight is acting for truck manufacturer MAN on multiple damages actions, following the European Commission’s truck cartel investigation. Richard Swallow leads the practice, where Jonathan Clark and recently promoted partners Camilla Sanger and Holly Ware are also noted.