John Lindsay Short, 1970s, Taboo Teenage Productions

Two schoolgirls (Kate Figes and NK0586) are waiting at a bus stop. The bus arrives, they get on, go upstairs (the conductor looks up their skirts). Upstairs they are chatted up by three blokes. All get off and go to a flat in a tower block where the darker-haired girl (Kate Figes) has sex with one of the men on the couch and the lighter-haired one (NK0586) takes on the other two on the floor.