School's Out Forever (2021)

Fifteen-year-old Lee Keegan faces expulsion from his prestigious school just as a cataclysmic event decimates the global population. With his father deceased and his mother stranded overseas, Lee's sole directive is to return to school. However, St. Mark's School for Boys offers little refuge. Its formidable walls fail to deter the local parish council, which has established a militia and enforced martial law. Inside, the apocalypse exacerbates tensions, affecting Lee's best friend, while his unresolved feelings for the school nurse distract him from the pressing need for survival.