The Solicitors Regulation Authority (SRA) has updated its guidance on effective supervision following the Court of Appeal's decision in Mazur v Charles Russell Speechlys LLP (Chartered Institute of Legal Executives and others, intervening) [2026] EWCA Civ 369. The revised guidance reflects the court's clarification that an unauthorised person may lawfully carry out tasks that fall within the scope of the conduct of litigation on behalf of an authorised individual. The guidance emphasises that the authorised individual remains responsible for delegated work and must be satisfied that arrangements are in place to ensure proper direction, management, supervision and control. The SRA has expanded the guidance on supervision and delegation arrangements, including audit and quality assurance measures, supervision in high-volume practices, supervision by individuals authorised by other legal regulators, and oversight of artificial intelligence (AI)-assisted or AI-generated legal work. The guidance also provides case studies and practical examples to assist firms in assessing the effectiveness of their supervision arrangements.