Has a film ever defined an era quite like Trainspotting did for 1990s Britain? The final decade of the 20th century was a proper monumental one for the United Kingdom, and Danny Boyle’s film emerged not just as an emblem of a changing pop cultural and political landscape, but a changing cinematic landscape for Britain, too. British cinema had seen its ups and downs over the years, with many icons of the silver screen emerging in the early years …