This screening is part of the excellenbt Cult series at BFI Southbank.
Here is the BFI introduction:
In an era inundated by generic slasher films, Sleepaway Camp stood (decapitated) head and shoulders above the competition. For shy teen Angela, summer vacation turns into a nightmare when the bodies of her fellow campers start piling up. Undeniably problematic in its sexual politics, this is nonetheless a fascinating one-of-a-kind that remains one of the subgenre’s queerest, most incendiary additions.
Here (and above) is the trailer.