The Legal Services Board (LSB) has published its final report on a regulatory review of the advice and guidance issued by approved regulators and regulatory bodies. The review was launched in October 2025 following the High Court judgment in Mazur v Charles Russell Speechlys LLP, which held that a person conducting litigation must be authorised or exempt, even where acting under supervision. However, on 31 March 2026, the Court of Appeal allowed an appeal brought by the Chartered Institute of Legal Executives and held that an unauthorised person may act on behalf of an authorised person to conduct litigation under their supervision, provided the authorised person puts in place appropriate arrangements for the supervision of, and delegation to, the unauthorised person. Following that clarification, regulators revisited their guidance, which had at times reflected differing interpretations of the Legal Services Act 2007 (LSA 2007), and the LSB’s final report considered both those earlier inconsistencies and the steps taken to align the guidance with the Court of Appeal’s judgment.