This document provides an introduction and overview of the implementation of the Third EU Money Laundering Directive in the United Kingdom. It discusses the global development of anti-money laundering regulations over time, from early unilateral state actions to increased international cooperation. It describes the three stages of money laundering (placement, layering, integration) and estimates the worldwide scale of money laundering. The document also outlines the UK's anti-money laundering framework, including key laws like the Proceeds of Crime Act 2000 and Money Laundering Regulations 2007. It concludes by noting that international policy has increasingly aimed to adopt harmonized anti-money laundering measures over the past two decades.