This document discusses the definition of gangs and the national policy framework around gangs in the UK. It provides several definitions of gangs from legal and academic sources, noting they often involve criminal activity, claiming territory, and being in conflict with other gangs. The national policy framework was informed by events like the deaths of Charlene and Letitia Shakespeare in 2003 and Rhys Jones in 2007, as well as the 2011 Birmingham Riots and death of Lee Rigby in 2013. The document explores what constitutes national policy and how social policies aim to improve welfare but also examines what happens when policies are implemented in practice.