Guy Wilkes Partner, Mayer Brown Guy Wilkes is a partner in the London office of law firm Mayer Brown. Guy advises a wide range of financial services clients on UK and EU financial services regulation and enforcement. Prior to joining Mayer Brown in 2016, Guy headed a department within the UK Financial Conduct Authority’s Enforcement Division where he led on a variety of large high-profile investigations. As a member of the FCA’s senior leadership team, Guy had responsibility for developing enforcement strategy, especially in relation to financial crime and anti-money laundering where Guy chaired the FCA’s cross-divisional working group. He also set up and ran the FCA’s internal expert group for investigations against senior individuals. Guy also contributed to the FCA’s competition strategy and is regularly asked to speak and comment on the FCA’s approach to regulation of fintech.