This chapter summarises what the United Kingdom (UK) seems to want to achieve in Brexit and examines the legal environment in which the vehicle industry operates. It addresses the ability of the UK vehicle industry to disentangle itself from the European Communities environmental regulatory framework. The chapter reviews the relationship between regulatory frameworks and free trading models and upcoming disruptors to the vehicle industry that will impact the UK regardless of Brexit. The chapter explores the emergence of regulations such as congestion charges and air quality restrictions, operating at a localised or city-specific level that affect the use of cars independent of national controls. It considers the possible outcome if Brexit proves to be a disaster for the UK car industry. The chapter also reviews the composition of the global light vehicle market and demonstrate that meeting the various international regulatory requirements is indeed a price of entry requirement which bilateral trade agreements are unlikely to alter.