Performance has gained a reputation as a classic British gangster film but really it is a modernist work about identity. The performers, particularly James Fox (Chas) and Mick Jagger (Turner) change under each other's influence, and their sexuality blurs. Performance owes much more to Ingmar Bergman's Persona than it does to the Krays, violent though it is. Donald Cammell wrote the quotable script under the influence of Joe Orton, full of cheeky, threatening non-sequiturs. Nicolas Roeg was responsible for the head-movie visuals which I think are the main attraction, the film increasing representing an acid trip, including the scenes played backwards and the strong colour themes. Warner Brothers apparently thought they were getting The Rolling Stones' version of a Hard Day's Night and were shocked by the sexual content and how grimy it all looked and shelved it for two years. It has become a cult favourite, better known as years go by.