In February 2016, the UK Supreme Court fundamentally changed the criminal law principles of accessorial liability when it handed down its decision in R v Jogee. The Court abolished the head of liability known as 'joint criminal enterprise' and replaced it with the ordinary principles of aiding and abetting, which it re-stated for this purpose. But the full implications of the case for the criminal law remain at present uncertain, underexplored and divisive. This book examines Jogee in detail, bringing together legal academics and barristers, all of them experts in the area of complicity, but each of whom have different experiences and views to bear on the issues under debate. The result is the first comprehensive analysis of the various issues that arise from Jogee. It is not just meant to provide a source of reference for academics and practitioners working in the area of complicity, its aim is more ambitious in that it seeks to chart the way forward and to suggest solutions to the various problems created by Jogee for criminal law theory and practice.