Which film featured footage of interviews and a punk band, Night Mail or There Is No Authority But Yourself
Night Mail: Night Mail is a 1936 documentary film about a London, Midland and Scottish Railway (LMS) mail train from London to Scotland, produced by the GPO Film Unit. Night Mail:  The film ends with a "verse commentary" by W. H. Auden, written for existing footage. There Is No Authority But Yourself: There is No Authority But Yourself is a Dutch film directed by Alexander Oey documenting the history of anarchist punk band Crass. There Is No Authority But Yourself:  The film features archive footage of the band and interviews with former members Steve Ignorant, Penny Rimbaud and Gee Vaucher.
There is No Authority But Yourself