F (also known as The Expelled) is a 2010 British slasher film written and directed by Johannes Roberts, and starring David Schofield, Eliza Bennett, Ruth Gemmell, Juliet Aubrey and Roxanne McKee.

Anderson is deeply affected by the incident and upon his return to teaching, he is an alcoholic, emotionally disturbed and separated from his wife, Helen (Aubrey).

Anderson finds his daughter smoking in the toilets with her boyfriend, Jake Eaves (Max Fowler) and headmistress Balham instructs them all to go home.

Meanwhile, PE teacher Nicky (McKee) passes through the gymnasium and into the changing rooms, where she is attacked by four teenagers wearing hoodies and carrying crowbars.

Balham realises she can finally sack Anderson and, unable to use the telephone, calls security guard James to ensure that the teacher does not re-enter the school, and Helen, to inform her of the assault.

She comes across a member of auxiliary staff Gary, (Tom Mannion), who is unaware of the situation in the school and goes after the attackers, but is electrocuted immediately after discovering Eaves, who is wrapped in barbed wire.

He puts Kate in the back seat of the car and drives her to the hospital, leaving Helen to walk around the school, unaware of her potential fate.

Variety wrote "Green-tinged lensing provides a unifying, if oppressive, aesthetic, while the sparse, haunting score, incorporating sinister choral elements, makes the grade.

"[3] Peter Bradshaw of the Guardian wrote that "There's a classy cast, including Ruth Gemmell as the headteacher and Juliet Aubrey as Robert's wife, but those faceless demon-hoodies seem to belong to a more supernatural kind of thriller to me, and slightly undermine the realist impact".