F

F (2010) is a British horror-thriller directed by Johannes Roberts — watch online on iFILM. David Schofield plays Robert Anderson, a teacher who was attacked by a student in his own classroom. The assault went unpunished, left him broken, and sent him drinking. Then one night, after the last class empties out, someone comes back.

A group of masked figures moves through the school after hours — silent, hooded, fast. Anderson and a handful of staff and students who stayed behind have nowhere to go and no idea who these people are or what they want. Roberts keeps the film deliberately stripped: no backstory, no motive, no monster mythology. Just corridors, darkness and the sound of something moving. For a lean 79 minutes it builds genuine dread out of almost nothing, which is harder than it looks. Stream F (2010) online on iFILM.