This book examines a key aspect of the post-financial crisis reform package in the EU and UK-the ratcheting up of internal control in banks and financial institutions. The legal framework for internal controls is an important part of prudential regulation, and internal control also constitutes a form of internal gate-keeping for financial firms so that compliance with laws and regulations can be secured. This book argues that the legal framework for internal control, which is a form of meta-regulation, is susceptible to weaknesses, and such weaknesses are critically examined by adopting an interdisciplinary approach. The book discusses whether post-crisis reforms adequately address the weaknesses in regulating internal control and proposes an alternative strategy to enhance the `governance' effectiveness of internal control.