Celyn is a partner in the Litigation and Dispute Resolution team in London.

Celyn advises banks, asset managers, insurers and other regulated firms on all aspects of contentious regulatory issues, including FCA/PRA enforcement investigations, section 166 skilled person reviews and internal investigations. He also advises on non-contentious regulatory matters, including senior management and governance issues, thematic reviews, conduct risk controls and the regulatory implications of Brexit.

He spent seven years at the FSA/FCA, leading some of the regulator's most high-profile enforcement cases before heading up the Enforcement Policy team.

He has particular knowledge of the Senior Managers and Certification Regime (SMCR), having been a member of the joint PRA/FCA working group on the SMCR and having advised many institutions on their implementation projects since rejoining private practice.

Celyn's views on issues such as the FCA's enforcement activities and the SMCR have been quoted in The Times, City AM, Thomson Reuters and Bloomberg.