The Navigators (2002), directed by Ken Loach and starring Dean Andrews, Tom Craig and Joe Duttine. Set in the 1995 privatisation of British Rail, this gritty, hard-hitting black comedy exposes greed and venality that lies beneath the neoliberal discourse of "productivity" and "efficiency," and the disastrous consequences it has for working-class communal values.
Now for something a little less dramatic and more irreverend. Team America, World Police (2004), directed by Trey Parker, of South Park fame. A satirical take on big-budget action movies and the gung-ho spirit of the post-11/09 noughties featuring puppets.
If you think that, and we quote, "strong language, violence and sex all involving puppets" is a bit over the top, then have a look at Derek Jarman's Jubilee (1977). Starring Toyah Willcox and Adam Ant (who also provides some of the music on the soundtrack), "Britain's first official punk movie" tells the story of how Queen Elizabeth I is transported to 20th century England, to a Buckingham Palace transformed into a recording studio for punk musicians.