Poplar's long tradition of political and social activism is illuminated in this ambitious feature-length film. The east London district has been home to both grassroots and high-profile radicals, from social reformer George Lansbury in the 1920s to the contemporary Teviot Festival Committee. This film was made by Liberation Films, a non-profit company which grew from a group of anti-Vietnam War activists.
Liberation Films evolved from activists into filmmakers producing campaigning films in local communities and were particularly active in the 1970s. One of the group commented about Fly a Flag for Poplar: "Of course, the film was a catalyst too. When we finished it we took it around in the community where it was made and led people in an examination and a reflection on their lives and whether they might want to intervene in the future to change them."