Here is a list of films compiled by David Campion, with some supplemental suggestions from the British Film Institute (BFI). Pick one for your term project. Again—be sure that you can access the film and that you can find analysis of the film and its topics/themes in published secondary sources before you commit to the film for your project.
List of films by era and/or topic: Additional information on selected films at Campion's The Making of Modern Britain” course page.