This document discusses British national identity and cultural diversity through examining British cinema from the 1940s to 2000s. It explores how nationality is constructed through geography, biology, race, ethnicity, institutions, shared values, and culture. Key periods of British cinema discussed include the Free Cinema movement of the 1950s, British New Wave of the 1960s, and social realist films that focused on working class lives. Contemporary representations of masculinity and the impacts of Thatcherism on British society in the 1980s are also summarized.