Justin leads the specialist Regulatory and Investigations team and is co-Head of the broader Commercial Litigation practice in London. He is acknowledged as a leading individual in the areas of both regulatory investigations and corporate crime, with the leading legal directories noting that "Justin McClelland can be a game-changer; he knows the case backwards and has superb instincts".

He is described as “knowledgeable, astute and empathetic” and “‘excellent’ at handling multi-jurisdictional investigations,” where his “structured, calm and thorough” approach has proved invaluable in resolving the most challenging matters for clients, whether corporate or individuals. The Directories have noted that “Justin McClelland is the main selling point as he brings considerable experience, expertise and judgement in the field’.” and that “Justin McClelland is the stand-out practitioner. He has considerable cross-over experience, excellent judgement and secures great results.” Justin’s practice is international and covers a number of sectors, including financial services, transport, construction, pharmaceuticals and energy, in the following areas: Regulatory investigations: Leading and managing the defence of corporate clients and individuals in complex, multi-jurisdictional investigations on issues such as market abuse, insider dealing, breaches of the FCA’s Principles and Rules, and cartel behaviour. The investigative agencies with which he has dealt include, in the UK, the FCA, the PRA, the FRC, the ICAEW, the MHRA, the NCA and the SFO and, overseas, the European Commission, the US DOJ, the NYAG, the US CFTC, the Dubai FSA and the Japanese FSA; Regulatory advice: Managing interactions with regulators in supervisory environments to avoid or minimise the impact of regulatory breaches pre-enforcement. The agencies dealt with have included (in the UK), the FCA, PRA, MCA, ICAEW and MHRA; Corporate investigations: Managing internal investigations involving POCA concerns, employment disputes, internal fraud allegations, export compliance/sanctions issues, bribery issues and data protection issues; High-value litigation: Representing clients in commercial and financial disputes including cross-jurisdictional litigation, multi-party actions, appellate proceedings, and follow-on actions arising from regulatory investigations; Compliance programmes: Providing assistance to clients in developing, implementing and reviewing compliance programmes. Prior to his private practice, Justin served as a lawyer in the British Army, reaching the rank of Lieutenant Colonel and prosecuting cases spanning the criminal spectrum at Courts Martial, as well as advising and negotiating internationally and at the highest levels of government. Justin was awarded the MBE in June 1998.