In Part 1 of this two-part article, barrister and Chartered Banker Jacob J Meagher analyses the legal basis of the novel “Audit Duty” using Rihan v Ernst & Young [2020] EWHC 901 (QB) as a case study. In Part 2 he discusses the uncertainties related to the scope and application of the “Audit Duty”, in particular to professional service firms more widely.